A1 noun #6,500 सबसे आम 11 मिनट पढ़ने का समय

solvent

A solvent is usually a liquid. It can dissolve another thing, like sugar in water, to make a mix.

Think of making lemonade. Water is the solvent because it dissolves the sugar and lemon juice.

It's the biggest part of the mix. So, water is the solvent when you make lemonade.

A solvent is usually a liquid. It helps to dissolve another substance. When you mix them, they create a solution. Think of water dissolving sugar; water is the solvent. In science, the solvent is the biggest part of a mixture.

A solvent, at its core, refers to a substance—most commonly a liquid—that possesses the capacity to dissolve other substances, known as solutes, thereby forming a solution.

In a quantitative sense, particularly within chemical contexts, the solvent is typically the component of a solution present in the largest molar or mass amount.

This fundamental interaction is crucial for numerous chemical processes, ranging from simple mixtures in daily life to complex industrial reactions and biological functions.

The efficacy and specificity of a solvent are dictated by its polarity and intermolecular forces, which determine its ability to interact favorably with and encapsulate solute molecules.

A solvent, fundamentally, refers to a substance—most commonly a liquid—that possesses the capacity to dissolve other substances, termed solutes, thereby forming a homogeneous mixture known as a solution.

Its efficacy is rooted in its molecular structure, which facilitates intermolecular interactions that overcome the cohesive forces within the solute, leading to its dispersion at a molecular or ionic level.

In scientific contexts, particularly chemistry, the solvent is quantitatively defined as the component of a solution present in the greatest molar or mass proportion, establishing the medium for the dissolution process.

The nature of the solvent—whether polar or nonpolar—dictates its selectivity, adhering to the principle of "like dissolves like," where polar solvents dissolve polar solutes and nonpolar solvents dissolve nonpolar solutes, a crucial aspect for diverse applications ranging from chemical synthesis to biological processes.

solvent 30 सेकंड में

  • dissolves other substances
  • usually a liquid
  • main part of a solution

§ What does it mean?

The word "solvent" is a noun, and it refers to a substance that can dissolve other substances. Think of it like a liquid cleaner that can make dirt or grime disappear. In the world of science, it's a key player in creating mixtures, especially solutions.

Definition
A substance, usually a liquid, that is used to dissolve another substance to create a mixture. In science, it is the part of a solution that is present in the largest amount.

Most of the time, when we talk about a solvent, we're talking about a liquid. Water is a very common and important solvent. It's often called the "universal solvent" because it can dissolve so many different things. For example, when you put sugar in water, the water acts as the solvent, and the sugar dissolves into it, creating a sugary solution.

Water is a common solvent for many salts.

Solvents are everywhere in our daily lives, even if we don't always realize it. They are used in cleaning products, paints, medicines, and even in cooking. Without solvents, many of the products we use every day wouldn't exist or wouldn't work the same way.

§ When do people use it?

People use the word "solvent" when they are talking about:

  • Chemistry and Science: This is where the term is most formally used. Scientists talk about solvents constantly when describing chemical reactions, creating solutions, or performing experiments.
  • Cleaning: Many cleaning products rely on solvents to break down and remove dirt, grease, and stains. For example, nail polish remover contains solvents that dissolve nail polish.
  • Painting and Art: Painters use solvents to thin paints, clean brushes, and remove paint from surfaces. Turpentine, for instance, is a common solvent in oil painting.
  • Industry: Various industries use solvents for manufacturing processes, such as in the production of plastics, textiles, and pharmaceuticals.
  • Everyday Discussions (less common at A1): While the term itself might be a bit more technical for an A1 learner, the concept of something dissolving another thing is very common. You might hear someone say, "I need something to dissolve this stain," and that "something" is often a solvent.

Let's look at a few more examples to help solidify your understanding:

The chemist chose a powerful solvent to dissolve the stubborn substance.

In this example, the chemist needs something strong to break down a difficult material, so they choose a powerful solvent.

You can use alcohol as a solvent to clean many surfaces.

Here, alcohol is acting as a cleaning agent because of its properties as a solvent.

Understanding the concept of a solvent is a fundamental part of learning about how different substances interact with each other. It helps us understand everything from making a cup of coffee to complex industrial processes. So, next time you see something dissolving, you'll know that a solvent is at work!

§ Understanding 'Solvent' as a Noun

Definition
A substance, usually a liquid, that is used to dissolve another substance to create a mixture. In science, it is the part of a solution that is present in the largest amount.

The word "solvent" is a noun. This means it names a thing – in this case, a type of substance. It's often used in scientific contexts, but you can also find it in everyday language, especially when talking about cleaning or dissolving something.

§ Basic Sentence Structures with 'Solvent'

When using "solvent" in a sentence, you will typically see it as the subject or object of a verb. It functions like other nouns, describing what something is or what is being acted upon.

Here are some common ways to use it:

  • As the subject of a sentence: The solvent dissolved the sugar.
  • As the object of a sentence: We added a new solvent to the mixture.

Water is a common solvent for many substances.

The paint thinner acts as a powerful solvent.

§ Prepositions Commonly Used with 'Solvent'

You'll often find "solvent" paired with prepositions that describe its role or what it interacts with. Some common prepositions include:

  • for: Indicates what the solvent is used to dissolve.
  • in: Refers to something being dissolved within the solvent.
  • as: Describes the function or role of the substance as a solvent.

Let's look at some examples:

Alcohol can be used as a solvent for cleaning.

The salt dissolved quickly in the water solvent.

This liquid is a good solvent for oil-based paints.

§ Using 'Solvent' in Scientific Contexts

In science, "solvent" has a very specific meaning. It's the component of a solution that is present in the largest amount and does the dissolving. When you are discussing chemistry, you will often use "solvent" in sentences that describe the process of making solutions.

In this experiment, water was used as the primary solvent.

The sugar will dissolve if you add it to a suitable solvent.

§ Everyday Usage of 'Solvent'

Beyond science, "solvent" is commonly used when talking about products that dissolve things, especially for cleaning or removing stains. Think about products like nail polish remover or paint thinner – these are often referred to as solvents because of their ability to dissolve other substances.

She used a mild solvent to remove the sticky residue.

Always use a solvent in a well-ventilated area.

§ Common Mistakes with 'Solvent' (Noun)

The word 'solvent' (noun) can sometimes be a bit tricky, especially for English learners at the A1 CEFR level. While its core meaning relates to dissolving other substances, there are a few common pitfalls to watch out for. Understanding these can help you use the word more accurately and avoid confusion.

§ 1. Confusing 'Solvent' (Noun) with 'Solution' (Noun)

One of the most frequent mistakes is using 'solvent' when 'solution' is the more appropriate term. A 'solvent' is the liquid that does the dissolving, while a 'solution' is the mixture that results from something being dissolved in a solvent. Think of it this way:

DEFINITION
A substance, usually a liquid, that is used to dissolve another substance to create a mixture. In science, it is the part of a solution that is present in the largest amount.

Water is a common solvent for sugar.

Here, water is the liquid that dissolves the sugar. The end result, the sugary water, is the solution.

The sugar dissolved quickly, creating a sweet solution.

§ 2. Using 'Solvent' as an Adjective

While 'solvent' can also be an adjective (meaning able to pay one's debts), at the A1 level, it's highly probable you'll encounter it primarily as a noun in scientific or everyday contexts related to dissolving. Confusing the noun form with the adjective form can lead to very different meanings.

  • As a noun: A liquid that dissolves.
  • As an adjective: Able to pay debts.

This paint thinner is a strong solvent.

Here, 'solvent' clearly refers to the liquid. If you were to say, 'The company is solvent,' it means the company has enough money to pay its bills, which is a completely different meaning.

§ 3. Incorrect Articles or Quantifiers

'Solvent' is a countable noun (you can have one solvent, two solvents, etc.). This means you need to use appropriate articles ('a,' 'an,' 'the') or quantifiers ('some,' 'many,' 'few') when using it in a sentence.

  • Incorrect: 'I need solvent to clean.'
  • Correct: 'I need a solvent to clean.'
  • Correct: 'There are many solvents used in chemistry.'

We used a strong solvent to remove the glue.

§ 4. Misunderstanding the Role in a Mixture

The definition specifies that a solvent is the part of a solution present in the largest amount. While this is often true, especially in simple solutions, it's not the defining characteristic of a solvent. The defining characteristic is its ability to dissolve another substance (the solute). Sometimes, people might get confused if the dissolving liquid is not the largest component by volume, though it's usually the case.

Alcohol is a good solvent for many perfumes.

In this case, the alcohol acts as the solvent because it dissolves the perfume oils, regardless of the exact proportions, although typically the solvent is the major component.

§ Summary of Key Takeaways

To avoid common mistakes with 'solvent' (noun):

  • Do not confuse it with 'solution.' 'Solvent' is the dissolver, 'solution' is the dissolved mixture.
  • At the A1 level, understand 'solvent' as a noun referring to a dissolving liquid, not the adjective form related to finances.
  • Use appropriate articles (a, an, the) or quantifiers (some, many) with 'solvent' as it is a countable noun.
  • Remember that the primary role of a solvent is to dissolve, even though it's usually the largest part of a solution.

By keeping these points in mind, you can confidently use 'solvent' in your English conversations and studies.

§ Similar Words and When to Use 'Solvent' vs. Alternatives

When discussing substances that dissolve others, several words might come to mind. While 'solvent' is a precise scientific term, understanding its nuances compared to more general terms can help you choose the best word for your context.

DEFINITION
A substance, usually a liquid, that is used to dissolve another substance to create a mixture. In science, it is the part of a solution that is present in the largest amount.

Common Alternatives and Their Usage:

  • Liquid: This is a very general term referring to a state of matter that flows freely but is of constant volume. While many solvents are liquids, not all liquids are solvents, and not all solvents are solely liquid (though this is the most common form). You would use 'liquid' when you simply need to describe the physical state of a substance, not its dissolving property.

    Water is a common liquid at room temperature.

  • Diluent: A diluent is a substance used to thin or reduce the concentration of another substance, often by adding it to a solution. While a diluent can also act as a solvent, its primary purpose is to make something less concentrated, not necessarily to dissolve it in the first place. You'd use 'diluent' when the focus is on reducing concentration.

    The nurse added a diluent to the medicine to make it less potent.

  • Medium: In a broader sense, a 'medium' can be the substance in which something exists or through which it is transmitted. In chemistry, it can sometimes refer to the environment where a reaction takes place, which might include a solvent. However, 'medium' is much broader and doesn't specifically imply dissolving properties. Use 'medium' when referring to the environment or surrounding substance.

    The bacteria grew well in the nutrient medium.

  • Thinner: This term is most often used in the context of paints and varnishes. A thinner is a volatile solvent used to reduce the viscosity (thickness) of paints, making them easier to apply. While a thinner is a type of solvent, 'thinner' specifically refers to its function in making paints less viscous. Use 'thinner' when you're talking about reducing the thickness of paint or similar substances.

    You need paint thinner to clean the brushes.

When to Specifically Use 'Solvent':

You should use 'solvent' when you want to specifically highlight the role of a substance in dissolving another substance to form a solution. It's the most accurate and scientific term for this function.

In chemistry, 'solvent' is part of a solution, alongside the 'solute' (the substance being dissolved). This distinction is crucial for understanding chemical processes.

Water is often called the universal solvent because it can dissolve so many different substances.

While some liquids can perform similar functions, 'solvent' specifically emphasizes the ability to create a homogeneous mixture by dissolving another substance.

ज़रूरी व्याकरण

Nouns can be countable or uncountable. 'Solvent' can be both. For example, 'This solvent is very effective' (uncountable) or 'There are many different solvents available' (countable).

Water is a common solvent. / We need to find another solvent for this paint.

Articles (a, an, the) are used with nouns. 'A' or 'an' is used for singular countable nouns when referring to one of many. 'The' is used for specific nouns or when something has already been mentioned.

A solvent is a liquid. / The solvent in this solution is water.

Adjectives describe nouns. They usually come before the noun.

A strong solvent can remove the stain. / This is a powerful solvent.

Prepositions often follow nouns to show relationships with other words in the sentence.

The solvent for this experiment is alcohol. / We use a solvent to clean the surface.

Nouns can be used as subjects or objects in a sentence.

The solvent evaporated quickly. (Subject) / She poured the solvent into the beaker. (Object)

स्तर के अनुसार उदाहरण

1

Water is a good solvent for sugar.

Water can dissolve sugar.

2

The paint needs a special solvent to clean it.

You need a special liquid to clean the paint.

3

In this experiment, alcohol is the solvent.

Alcohol is the liquid that dissolves things here.

4

Many glues use a strong solvent.

Some glues have a powerful liquid that dissolves other things.

5

The chemist poured the solvent into the beaker.

The scientist put the dissolving liquid into the glass cup.

6

Oil does not mix with water, so water is not a solvent for oil.

Water cannot dissolve oil.

7

You can use this solvent to remove the stains.

This liquid can help take away the marks.

8

The solvent made the solid disappear.

The liquid made the hard thing vanish.

1

Water is a common solvent for sugar.

Water can dissolve sugar.

A 'common solvent' means it is often used for dissolving things.

2

Paint thinner acts as a strong solvent for oil paints.

Paint thinner dissolves oil paints well.

'Acts as' means it functions as something.

3

In this experiment, alcohol is used as the solvent.

Alcohol is the liquid that dissolves other things here.

Using 'as the solvent' describes its role.

4

The chemist needed a different solvent to clean the glass.

The chemist needed another liquid to dissolve dirt from the glass.

'A different solvent' implies the first one wasn't suitable.

5

Some glues need a special solvent to remove them.

You need a particular liquid to dissolve some glues.

'Special solvent' means it's not a common one.

6

The artist spilled paint, so she grabbed a solvent to clean it.

The artist used a liquid to dissolve the spilled paint.

'Grabbed a solvent' means quickly took one.

7

Oil and water don't mix; water is not a solvent for oil.

Water cannot dissolve oil.

'Is not a solvent for' explains why something doesn't dissolve.

8

Be careful when using a strong solvent, it can be dangerous.

Strong dissolving liquids can be harmful, so be careful.

'Strong solvent' means it can dissolve things very effectively, but might also be dangerous.

1

Water is a common solvent for many everyday substances like sugar and salt.

Water dissolves many things.

2

To remove the stain, you might need a stronger solvent than just water.

You need something stronger than water to clean the stain.

3

Paint thinners often contain chemical solvents that can be dangerous if not used carefully.

Paint cleaners have strong chemicals.

4

The chemist used a special solvent to extract the essential oils from the plant.

The scientist used a special liquid to get oil from the plant.

5

Acetone is a powerful solvent used in nail polish remover.

Nail polish remover has a strong liquid called acetone.

6

When cleaning brushes, it's important to use the correct solvent for the type of paint.

Use the right liquid to clean paint brushes.

7

Some glues require a specific solvent to break them down.

Certain glues need a special liquid to dissolve them.

8

In a sugar solution, water is the solvent and sugar is the solute.

In sugar water, water dissolves the sugar.

1

The artist used a powerful solvent to clean the paintbrushes thoroughly after finishing the masterpiece.

Solvent here means a liquid that dissolves paint.

Here, 'solvent' is a noun, the object of the verb 'used'.

2

Water is often called the universal solvent because of its ability to dissolve many different substances.

Universal solvent refers to water's dissolving properties.

'Universal solvent' acts as a compound noun, describing water.

3

To remove the stubborn stain, I applied a specialized solvent directly to the fabric, hoping it would work.

Specialized solvent indicates a specific type of dissolving liquid.

'Specialized' is an adjective modifying 'solvent'.

4

In chemistry, understanding the properties of a solvent is crucial for successful reactions and experiments.

Properties of a solvent relates to its characteristics in chemistry.

'Properties of a solvent' is a noun phrase, acting as the object of 'understanding'.

5

The industrial solvent used in the factory needs to be handled with extreme care due to its hazardous nature.

Industrial solvent means a solvent used in industry.

'Industrial' is an adjective modifying 'solvent'.

6

Before painting, make sure to use a suitable solvent to clean and prepare the surface for optimal adhesion.

Suitable solvent implies the right type of solvent for a task.

'Suitable' is an adjective modifying 'solvent'.

7

The scientist carefully measured the amount of solvent needed to create a perfectly balanced solution.

Amount of solvent refers to the quantity of the dissolving liquid.

'Amount of solvent' is a noun phrase, acting as the object of 'measured'.

8

Some glues require a specific solvent to break down their bonds, making them easier to remove.

Specific solvent means a particular type of solvent.

'Specific' is an adjective modifying 'solvent'.

1

The artist carefully selected a non-toxic solvent to thin the oil paints, ensuring both safety and optimal consistency for their masterpiece.

Non-toxic solvent for oil paints.

Here, 'solvent' is used to refer to a substance for thinning paint.

2

In the pharmaceutical industry, precise control over the purity of the solvent is paramount to avoid contamination in drug formulations.

Purity of solvent crucial in pharmaceuticals.

The word 'paramount' emphasizes the extreme importance of the solvent's purity.

3

Researchers are developing novel green solvents derived from renewable resources to reduce the environmental impact of chemical processes.

Green solvents from renewable resources.

'Novel green solvents' highlights new, environmentally friendly types of solvents.

4

The industrial cleaner utilized a powerful solvent to strip away layers of old paint and grime from the machinery.

Powerful solvent to remove paint and grime.

'Powerful solvent' indicates a strong chemical agent.

5

Understanding the polarity of different solvents is fundamental for predicting their effectiveness in various extraction procedures.

Solvent polarity and extraction effectiveness.

'Polarity' is a scientific term related to chemical properties, applied to solvents.

6

The chemist meticulously evaporated the solvent from the solution, leaving behind a crystalline residue of the synthesized compound.

Evaporating solvent to get crystalline residue.

'Meticulously evaporated' suggests a careful and precise scientific process.

7

Certain organic solvents are highly volatile and require specialized ventilation systems when used in laboratory settings to prevent inhalation hazards.

Volatile organic solvents need ventilation.

'Highly volatile' describes solvents that evaporate quickly and produce fumes.

8

The choice of an appropriate solvent is a critical factor in determining the yield and purity of a chemical reaction's product.

Solvent choice impacts reaction yield and purity.

'Critical factor' emphasizes the significant role the solvent plays in the outcome.

समानार्थी शब्द

dissolver diluent thinner liquid agent

विलोम शब्द

solute precipitate

सामान्य शब्द संयोजन

chemical solvent a chemical liquid that dissolves other substances
organic solvent a carbon-containing liquid that dissolves other substances
polar solvent a solvent with uneven charge distribution
nonpolar solvent a solvent with even charge distribution
universal solvent a substance that dissolves most chemicals (like water)
industrial solvent a solvent used in manufacturing processes
paint solvent a solvent used to thin or remove paint
cleaning solvent a solvent used for cleaning purposes
dissolving solvent a solvent that dissolves something
aqueous solvent a water-based solvent

सामान्य वाक्यांश

solvent for

a liquid that dissolves something specific

used as a solvent

to be employed in the role of a substance that dissolves others

act as a solvent

to perform the function of dissolving other substances

a good solvent

an effective substance for dissolving other materials

a strong solvent

a powerful substance that can dissolve difficult materials

the primary solvent

the main liquid used to dissolve something

require a solvent

to need a substance that can dissolve something

remove with a solvent

to take something away using a dissolving liquid

mix with a solvent

to combine something with a dissolving liquid

evaporate the solvent

to allow the dissolving liquid to turn into vapor

इसे कैसे इस्तेमाल करें

A 'solvent' is usually a liquid. Think of water dissolving sugar – water is the solvent. In chemistry, the solvent is the biggest part of a solution.

सामान्य गलतियाँ

Some people confuse 'solvent' with 'solute'. Remember, the solvent is what does the dissolving, and the solute is what gets dissolved.

सुझाव

Visual Association

Picture a liquid dissolving something. Imagine sugar disappearing in water – water is the solvent.

Use Flashcards

Create flashcards with 'solvent' on one side and its definition and an example sentence on the other.

Speak it Out

Practice saying 'solvent' aloud multiple times. Hear yourself use the word.

Write it Down

Write sentences using 'solvent'. The act of writing helps to solidify the memory.

Don't Confuse with 'Soluble'

Remember that 'solvent' is the *liquid* that dissolves, while 'soluble' describes something that *can be dissolved*. Don't mix them up; they're different parts of speech.

Relate to Science Class

If you've studied chemistry, connect 'solvent' to concepts like solutions and mixtures you already know.

Find Synonyms/Antonyms (if applicable)

While direct antonyms for 'solvent' (in this scientific sense) are less common, thinking of related words like 'solute' (what gets dissolved) can deepen understanding.

Review Regularly

Go over 'solvent' and other new words regularly. Spaced repetition is very effective for long-term memory.

Teach Someone Else

Try explaining 'solvent' and its definition to a friend. Teaching reinforces your own learning.

असल ज़िंदगी में अभ्यास करें

वास्तविक संदर्भ

In chemistry class, we learned that water is a universal **solvent** because it can dissolve many different substances.

  • universal solvent
  • dissolve many substances
  • chemistry class

To clean the paintbrushes, you need a strong **solvent** like paint thinner.

  • strong solvent
  • paint thinner
  • clean paintbrushes

Nail polish remover acts as a **solvent** to take off nail polish.

  • nail polish remover
  • acts as a solvent
  • take off nail polish

Many cleaning products use a **solvent** to break down grease and dirt.

  • cleaning products
  • break down grease
  • use a solvent

Sugar is a good **solvent** for making lemonade; it dissolves easily in water.

  • good solvent for making lemonade
  • dissolves easily in water
  • sugar

बातचीत की शुरुआत

"What is something you've learned that water is a good solvent for?"

"Can you think of any other household products that act as a solvent?"

"Have you ever used a solvent to clean something?"

"What would happen if you tried to mix oil and water, considering their solvent properties?"

"If you had to explain what a solvent is to a younger child, how would you do it?"

डायरी विषय

Describe a time you observed something dissolving in a liquid. What do you think the solvent was in that situation?

Think about everyday cleaning tasks. How do solvents help make things clean?

If you could invent a new universal solvent that could dissolve anything safely, what would you use it for?

Write about the importance of water as a solvent for life on Earth.

Imagine you are a tiny particle being dissolved by a solvent. Describe your experience.

अक्सर पूछे जाने वाले सवाल

10 सवाल

A solvent is usually a liquid that can dissolve other things. Think of water dissolving sugar; in that case, water is the solvent.

Yes, water is a very common and important solvent. It's often called the 'universal solvent' because it can dissolve so many different substances.

Certainly! Imagine you put salt in water. The water is the solvent, and it breaks down the salt into tiny pieces so it seems to disappear. This creates a saltwater mixture.

Typically, yes, a solvent is usually a liquid. However, in some scientific contexts, it can refer to a substance that dissolves another, even if it's not a liquid, though liquid solvents are the most common.

That's a great question! The solvent is the substance that does the dissolving (usually the larger amount), and the solute is the substance that gets dissolved.

In science, solvents are essential for creating solutions and for many chemical reactions. They help mix substances together so they can interact.

Yes, there are many different kinds! Besides water, common solvents include alcohol, acetone (found in nail polish remover), and paint thinners. Each one can dissolve different things.

If something is 'insoluble,' it means it cannot be dissolved by a particular solvent. For example, oil is insoluble in water, meaning water can't act as a solvent for oil.

The solvent itself doesn't change chemically when it dissolves something. It just helps spread out the other substance evenly to form a mixture. You can often get the original solvent back.

You might hear 'solvent' when talking about cleaning products, like paint thinners or stain removers, as these often contain strong solvents to dissolve dirt or paint.

खुद को परखो 138 सवाल

multiple choice A1

Which of these is often used as a solvent?

सही! बिलकुल नहीं। सही जवाब: Water

Water is a very common liquid that can dissolve many things.

multiple choice A1

What does a solvent do?

सही! बिलकुल नहीं। सही जवाब: It dissolves another substance.

The definition of a solvent is a substance that dissolves another substance.

multiple choice A1

If you put sugar in hot tea, what is the hot tea acting as?

सही! बिलकुल नहीं। सही जवाब: A solvent

The tea dissolves the sugar, so the tea is the solvent.

true false A1

A solvent is usually a liquid.

सही! बिलकुल नहीं। सही जवाब: सही

The definition says a solvent is usually a liquid.

true false A1

A solvent makes things harder.

सही! बिलकुल नहीं। सही जवाब: गलत

A solvent dissolves another substance, it doesn't make things harder.

true false A1

When you mix salt and water, the water is the solvent.

सही! बिलकुल नहीं। सही जवाब: सही

The water dissolves the salt, so it is the solvent.

listening A1

Think about dissolving.

सही! बिलकुल नहीं। सही जवाब: Water is a good solvent for sugar.
सही! बिलकुल नहीं। सही जवाब:
listening A1

What cleans paint?

सही! बिलकुल नहीं। सही जवाब: The paint needs a special solvent to clean it.
सही! बिलकुल नहीं। सही जवाब:
listening A1

What is dissolving something else?

सही! बिलकुल नहीं। सही जवाब: In this experiment, alcohol is the solvent.
सही! बिलकुल नहीं। सही जवाब:
speaking A1

Read this aloud:

Can you name a common solvent?

Focus: solvent

सही! बिलकुल नहीं। सही जवाब:
speaking A1

Read this aloud:

Water can be a solvent for many things.

Focus: water, solvent

सही! बिलकुल नहीं। सही जवाब:
speaking A1

Read this aloud:

A solvent helps to dissolve.

Focus: solvent, dissolve

सही! बिलकुल नहीं। सही जवाब:
writing A1

Write a short sentence using the word 'solvent'.

Well written! Good try! Check the sample answer below.

Sample answer

Water is a good solvent.

सही! बिलकुल नहीं। सही जवाब:
writing A1

Complete the sentence: 'The paint needs a special ______ to clean the brush.'

Well written! Good try! Check the sample answer below.

Sample answer

The paint needs a special solvent to clean the brush.

सही! बिलकुल नहीं। सही जवाब:
writing A1

Describe in one simple sentence what a 'solvent' is.

Well written! Good try! Check the sample answer below.

Sample answer

A solvent is a liquid that can dissolve other things.

सही! बिलकुल नहीं। सही जवाब:
reading A1

What does Sarah need to clean her brushes?

Read this passage:

Sarah wants to clean her art brushes. The paint is very thick. She needs a liquid that can dissolve the paint. This liquid is called a solvent.

What does Sarah need to clean her brushes?

सही! बिलकुल नहीं। सही जवाब: a solvent

The passage states that 'She needs a liquid that can dissolve the paint. This liquid is called a solvent.'

सही! बिलकुल नहीं। सही जवाब: a solvent

The passage states that 'She needs a liquid that can dissolve the paint. This liquid is called a solvent.'

reading A1

What is water called in chemistry?

Read this passage:

In chemistry, water is often called a 'universal solvent'. This means it can dissolve many different substances. Sugar dissolves in water easily.

What is water called in chemistry?

सही! बिलकुल नहीं। सही जवाब: a universal solvent

The passage says, 'water is often called a 'universal solvent'.'

सही! बिलकुल नहीं। सही जवाब: a universal solvent

The passage says, 'water is often called a 'universal solvent'.'

reading A1

In this story, what is the solvent?

Read this passage:

A chef is making a sweet drink. He puts sugar into hot tea. The hot tea is the solvent because it makes the sugar disappear into the drink.

In this story, what is the solvent?

सही! बिलकुल नहीं। सही जवाब: the hot tea

The passage states, 'The hot tea is the solvent because it makes the sugar disappear into the drink.'

सही! बिलकुल नहीं। सही जवाब: the hot tea

The passage states, 'The hot tea is the solvent because it makes the sugar disappear into the drink.'

sentence order A1

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: Water is a good solvent.

This sentence introduces the concept of a solvent.

sentence order A1

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: Sugar can dissolve in a solvent.

This sentence shows an example of what a solvent does.

sentence order A1

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: The paint needs a solvent to clean.

This sentence provides a practical use of a solvent.

fill blank A2

Water is a common ___ for many substances, like salt and sugar.

सही! बिलकुल नहीं। सही जवाब: solvent

A solvent is a substance that dissolves another substance.

fill blank A2

To clean the paint off the brush, you need a special chemical ___.

सही! बिलकुल नहीं। सही जवाब: solvent

A chemical solvent is used to dissolve and remove substances like paint.

fill blank A2

In a solution of sugar and water, the water is the ___ because there is more of it.

सही! बिलकुल नहीं। सही जवाब: solvent

The solvent is the part of a solution present in the largest amount.

fill blank A2

Oil and water do not mix well because oil is not a good ___ for water.

सही! बिलकुल नहीं। सही जवाब: solvent

If two substances do not mix, one is not a good solvent for the other.

fill blank A2

The chemist used a strong ___ to dissolve the unknown substance.

सही! बिलकुल नहीं। सही जवाब: solvent

Chemists use solvents to dissolve substances in experiments.

fill blank A2

Rubbing alcohol can act as a ___ to clean surfaces.

सही! बिलकुल नहीं। सही जवाब: solvent

Rubbing alcohol dissolves dirt and grime, so it acts as a solvent.

multiple choice A2

Which of these is most likely a solvent?

सही! बिलकुल नहीं। सही जवाब: Water

Water is often called the 'universal solvent' because it can dissolve many substances.

multiple choice A2

If you mix sugar in hot tea, what is the tea acting as?

सही! बिलकुल नहीं। सही जवाब: A solvent

The tea dissolves the sugar, so it is the solvent.

multiple choice A2

Which sentence correctly uses the word 'solvent'?

सही! बिलकुल नहीं। सही जवाब: The painter used a special solvent to clean the brushes.

In this context, 'solvent' refers to a liquid that dissolves another substance, like paint.

true false A2

A solvent is always a solid.

सही! बिलकुल नहीं। सही जवाब: गलत

A solvent is usually a liquid, like water, that dissolves another substance.

true false A2

When you make coffee, the water is the solvent.

सही! बिलकुल नहीं। सही जवाब: सही

Water dissolves the coffee powder, so it is the solvent in this case.

true false A2

If a substance dissolves in another liquid, the liquid is the solvent.

सही! बिलकुल नहीं। सही जवाब: सही

By definition, the substance that dissolves another substance is the solvent.

writing A2

Imagine you are explaining what a 'solvent' is to a friend. Write a simple sentence describing it.

Well written! Good try! Check the sample answer below.

Sample answer

A solvent is a liquid that can dissolve other things, like sugar in water.

सही! बिलकुल नहीं। सही जवाब:
writing A2

Think of a common household item that acts as a solvent. Write a short sentence about it.

Well written! Good try! Check the sample answer below.

Sample answer

Water is a good solvent for cleaning many things in the house.

सही! बिलकुल नहीं। सही जवाब:
writing A2

Complete the sentence: 'When you mix sugar in water, the water acts as the ___.'

Well written! Good try! Check the sample answer below.

Sample answer

When you mix sugar in water, the water acts as the solvent.

सही! बिलकुल नहीं। सही जवाब:
reading A2

What is the role of the solvent in a solution?

Read this passage:

In chemistry, a solution is made of two parts: a solute and a solvent. The solvent is the substance that dissolves the other substance (the solute). For example, when you make coffee, hot water is the solvent that dissolves the coffee grounds.

What is the role of the solvent in a solution?

सही! बिलकुल नहीं। सही जवाब: It is the substance that does the dissolving.

The passage states, 'The solvent is the substance that dissolves the other substance.'

सही! बिलकुल नहीं। सही जवाब: It is the substance that does the dissolving.

The passage states, 'The solvent is the substance that dissolves the other substance.'

reading A2

Which of these is NOT mentioned as a common solvent in the text?

Read this passage:

You can find solvents all around you. Water is a very common solvent, used in drinks, for cleaning, and even inside your body. Other solvents include alcohol, which can dissolve certain types of inks, and paint thinner, which is used to clean paint brushes.

Which of these is NOT mentioned as a common solvent in the text?

सही! बिलकुल नहीं। सही जवाब: Oil

The passage mentions water, alcohol, and paint thinner as common solvents, but not oil.

सही! बिलकुल नहीं। सही जवाब: Oil

The passage mentions water, alcohol, and paint thinner as common solvents, but not oil.

reading A2

Why are solvents important in cleaning products?

Read this passage:

When you want to remove a stain from your clothes, you often use a cleaning product. Many cleaning products contain solvents that help break down and remove the stain. Without a good solvent, it would be much harder to get your clothes clean.

Why are solvents important in cleaning products?

सही! बिलकुल नहीं। सही जवाब: They help to break down and remove stains.

The passage states that solvents 'help break down and remove the stain' in cleaning products.

सही! बिलकुल नहीं। सही जवाब: They help to break down and remove stains.

The passage states that solvents 'help break down and remove the stain' in cleaning products.

sentence order A2

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: Water is a good solvent

This sentence means that water can dissolve many substances.

sentence order A2

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: The paint remover is a strong solvent

This sentence explains that paint remover is a powerful liquid used for dissolving paint.

sentence order A2

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: Sugar dissolves easily in water

This sentence describes how sugar can be dissolved in water.

fill blank B1

Water is often called the universal ___ because it can dissolve many substances.

सही! बिलकुल नहीं। सही जवाब: solvent

In chemistry, a solvent is a substance that dissolves a solute, forming a solution. Water's ability to dissolve many different substances earns it the title of 'universal solvent.'

fill blank B1

To remove the paint, you'll need a strong ___ like turpentine.

सही! बिलकुल नहीं। सही जवाब: solvent

Many paints are dissolved by specific solvents, making them useful for cleaning or thinning the paint.

fill blank B1

The chemist carefully added the powder to the liquid ___, stirring until it was fully dissolved.

सही! बिलकुल नहीं। सही जवाब: solvent

The liquid substance that dissolves another substance is referred to as the solvent.

fill blank B1

If you want to dilute the paint, you need to add more of the appropriate ___.

सही! बिलकुल नहीं। सही जवाब: solvent

Diluting paint often involves adding more of the solvent that the paint is based in, which thins it out.

fill blank B1

In this experiment, alcohol acts as the ___ to dissolve the various plant extracts.

सही! बिलकुल नहीं। सही जवाब: solvent

Alcohol is commonly used as a solvent in experiments and in the extraction of substances due to its ability to dissolve a wide range of compounds.

fill blank B1

The cleaning product contains a powerful ___ to break down grease and oil.

सही! बिलकुल नहीं। सही जवाब: solvent

Many cleaning products use solvents specifically designed to dissolve and remove stubborn substances like grease and oil.

listening B1

Listen for the word 'solvent' and understand its context.

सही! बिलकुल नहीं। सही जवाब: The painter used a strong solvent to clean the brushes after finishing the artwork.
सही! बिलकुल नहीं। सही जवाब:
listening B1

Pay attention to why water is called a 'universal solvent'.

सही! बिलकुल नहीं। सही जवाब: In chemistry class, we learned that water is a universal solvent because it can dissolve many substances.
सही! बिलकुल नहीं। सही जवाब:
listening B1

Consider the safety implications of certain types of 'solvents'.

सही! बिलकुल नहीं। सही जवाब: Be careful when handling industrial solvents; they can be harmful if not used properly.
सही! बिलकुल नहीं। सही जवाब:
speaking B1

Read this aloud:

Could you explain what a solvent is in your own words?

Focus: solvent

सही! बिलकुल नहीं। सही जवाब:
speaking B1

Read this aloud:

Describe a situation where you might need to use a solvent.

Focus: solvent, situation

सही! बिलकुल नहीं। सही जवाब:
speaking B1

Read this aloud:

What are some safety precautions one should take when working with powerful solvents?

Focus: safety precautions, powerful solvents

सही! बिलकुल नहीं। सही जवाब:
writing B1

Imagine you are explaining the word "solvent" to a friend. Write a short explanation (2-3 sentences) using simple language and an example from everyday life.

Well written! Good try! Check the sample answer below.

Sample answer

A solvent is a liquid that can dissolve other things. For instance, water is a common solvent because it can dissolve sugar or salt to make a mixture. So, if you stir sugar into your tea, the water is the solvent.

सही! बिलकुल नहीं। सही जवाब:
writing B1

Complete the following sentence to explain what a solvent does: "A chemical engineer used a powerful ___ to dissolve the stubborn stains from the old machinery."

Well written! Good try! Check the sample answer below.

Sample answer

A chemical engineer used a powerful solvent to dissolve the stubborn stains from the old machinery.

सही! बिलकुल नहीं। सही जवाब:
writing B1

Write a sentence describing a situation where a 'solvent' would be useful in a household context.

Well written! Good try! Check the sample answer below.

Sample answer

To clean the dried paint off the brushes, I soaked them in a special solvent, which helped to dissolve the paint and make them clean again.

सही! बिलकुल नहीं। सही जवाब:
reading B1

According to the passage, what is the role of a solvent in a solution?

Read this passage:

In chemistry, a solution is a homogeneous mixture composed of two or more substances. The substance present in the largest amount, which dissolves the other substances, is called the solvent. The substances that are dissolved are called solutes. For example, when sugar is dissolved in water, water is the solvent and sugar is the solute.

According to the passage, what is the role of a solvent in a solution?

सही! बिलकुल नहीं। सही जवाब: It is the substance that dissolves other substances.

The passage clearly states, 'The substance present in the largest amount, which dissolves the other substances, is called the solvent.'

सही! बिलकुल नहीं। सही जवाब: It is the substance that dissolves other substances.

The passage clearly states, 'The substance present in the largest amount, which dissolves the other substances, is called the solvent.'

reading B1

Based on the text, what is one common use of solvents in the paint industry?

Read this passage:

Different types of solvents are used in various industries. For instance, in the paint industry, solvents are crucial for thinning paints and varnishes, making them easier to apply. In cleaning products, solvents help to break down grease and dirt. The choice of solvent depends on what needs to be dissolved and for what purpose.

Based on the text, what is one common use of solvents in the paint industry?

सही! बिलकुल नहीं। सही जवाब: To help apply paints and varnishes more easily.

The passage states, 'In the paint industry, solvents are crucial for thinning paints and varnishes, making them easier to apply.'

सही! बिलकुल नहीं। सही जवाब: To help apply paints and varnishes more easily.

The passage states, 'In the paint industry, solvents are crucial for thinning paints and varnishes, making them easier to apply.'

reading B1

Why is water referred to as the 'universal solvent'?

Read this passage:

Water is often called the 'universal solvent' because it can dissolve more substances than any other liquid. This property is vital for life on Earth, as water carries nutrients to cells and removes waste products. However, not all substances dissolve in water; for example, oil does not dissolve in water.

Why is water referred to as the 'universal solvent'?

सही! बिलकुल नहीं। सही जवाब: Because it can dissolve more substances than other liquids.

The passage explicitly says, 'Water is often called the 'universal solvent' because it can dissolve more substances than any other liquid.'

सही! बिलकुल नहीं। सही जवाब: Because it can dissolve more substances than other liquids.

The passage explicitly says, 'Water is often called the 'universal solvent' because it can dissolve more substances than any other liquid.'

sentence order B1

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: Water is a common solvent

This sentence introduces a common example of a solvent.

sentence order B1

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: The paint thinner acts as a solvent

This sentence explains the function of a paint thinner.

sentence order B1

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: Sugar dissolves in hot water because water is a solvent

This sentence describes a common observation and links it to the concept of a solvent.

multiple choice B2

Which of the following best describes the primary function of a solvent in chemistry?

सही! बिलकुल नहीं। सही जवाब: To dissolve other substances, forming a uniform mixture.

A solvent's main role is to dissolve solutes, creating a solution. The other options describe different chemical processes or roles.

multiple choice B2

In a sugar-water solution, what role does the water play?

सही! बिलकुल नहीं। सही जवाब: It acts as the solvent, dissolving the sugar.

Water is typically the solvent in aqueous solutions, meaning it is the substance that dissolves another (the solute, in this case, sugar).

multiple choice B2

Which characteristic is essential for a substance to be considered a good solvent?

सही! बिलकुल नहीं। सही जवाब: It must be capable of dissolving the solute to form a homogeneous mixture.

The fundamental characteristic of a solvent is its ability to dissolve a solute, leading to a homogeneous solution. Other characteristics might apply to specific solvents but are not universally essential.

true false B2

In a solution, the solvent is always present in a smaller amount than the solute.

सही! बिलकुल नहीं। सही जवाब: गलत

This statement is false. By definition, the solvent is the component of a solution that is present in the largest amount, or the substance that dissolves the solute.

true false B2

Water is often referred to as the 'universal solvent' due to its ability to dissolve a wide range of substances.

सही! बिलकुल नहीं। सही जवाब: सही

This statement is true. Water's polarity allows it to dissolve many ionic and polar compounds, earning it the nickname 'universal solvent'.

true false B2

Oil and water readily mix because water is an effective solvent for oil.

सही! बिलकुल नहीं। सही जवाब: गलत

This statement is false. Oil and water do not readily mix because oil is non-polar and water is polar, making water an ineffective solvent for oil.

writing B2

Imagine you are a scientist explaining the process of dissolving sugar in water to a group of high school students. Describe the role of water as a solvent in this process. Use at least 70 words.

Well written! Good try! Check the sample answer below.

Sample answer

When we dissolve sugar in water, water acts as the solvent. The water molecules, due to their polarity, are very effective at interacting with the sugar molecules. They surround the individual sugar molecules and pull them apart from each other, effectively breaking down the sugar crystal. This process distributes the sugar evenly throughout the water, forming a homogeneous mixture we call a solution. Without a suitable solvent like water, the sugar would not be able to disperse in this way, and we wouldn't have a sweet drink.

सही! बिलकुल नहीं। सही जवाब:
writing B2

You are writing a product description for an eco-friendly cleaning product. Explain how the product's primary ingredient, a natural solvent, works to remove grease and grime without harming the environment. Focus on its 'solvent' properties.

Well written! Good try! Check the sample answer below.

Sample answer

Introducing our revolutionary eco-friendly cleaner, harnessing the power of nature's finest solvents. Our primary ingredient, a plant-based solvent, is expertly formulated to dissolve even the toughest grease and grime. Unlike harsh chemical alternatives, this natural solvent works by effectively breaking down the molecular bonds of oil and dirt, allowing them to be easily wiped away. It's tough on messes but gentle on surfaces and, most importantly, on our planet. You can clean with confidence, knowing you're using a powerful, non-toxic solution that leaves no harmful residues.

सही! बिलकुल नहीं। सही जवाब:
writing B2

Describe a common household situation where a solvent is used to clean something or prepare a mixture. Explain what the solvent is, what it dissolves, and why it's effective for that specific task.

Well written! Good try! Check the sample answer below.

Sample answer

A common household situation involving a solvent is using nail polish remover to clean off old nail polish. The nail polish remover, often containing acetone or ethyl acetate, acts as the solvent. It effectively dissolves the polymers and pigments that make up the nail polish. This effectiveness stems from the solvent's ability to break down the chemical structure of the polish, allowing it to be wiped away easily. Without such a strong solvent, removing nail polish would be a very difficult and messy task, as water alone would not be able to dissolve it.

सही! बिलकुल नहीं। सही जवाब:
reading B2

According to the passage, what defines a solvent in a chemical solution?

Read this passage:

In chemistry, a solution is a homogeneous mixture composed of two or more substances. The substance present in the largest amount, and which dissolves the other substance(s), is called the solvent. The substance that is dissolved is called the solute. For example, when sugar is dissolved in water, water is the solvent and sugar is the solute, forming a sugar solution.

According to the passage, what defines a solvent in a chemical solution?

सही! बिलकुल नहीं। सही जवाब: It is the substance present in the largest amount and dissolves others.

The passage clearly states, 'The substance present in the largest amount, and which dissolves the other substance(s), is called the solvent.'

सही! बिलकुल नहीं। सही जवाब: It is the substance present in the largest amount and dissolves others.

The passage clearly states, 'The substance present in the largest amount, and which dissolves the other substance(s), is called the solvent.'

reading B2

Why is the careful selection of solvents important in industrial applications?

Read this passage:

Industrial applications often require specialized solvents to clean machinery or to facilitate chemical reactions. These solvents must be carefully chosen based on their ability to dissolve specific contaminants or reactants, as well as their safety profiles and environmental impact. For instance, in the electronics industry, highly pure solvents are used to clean circuit boards, ensuring no residues are left that could interfere with conductivity.

Why is the careful selection of solvents important in industrial applications?

सही! बिलकुल नहीं। सही जवाब: Because they need to dissolve specific substances and have safety/environmental considerations.

The passage states solvents 'must be carefully chosen based on their ability to dissolve specific contaminants or reactants, as well as their safety profiles and environmental impact.'

सही! बिलकुल नहीं। सही जवाब: Because they need to dissolve specific substances and have safety/environmental considerations.

The passage states solvents 'must be carefully chosen based on their ability to dissolve specific contaminants or reactants, as well as their safety profiles and environmental impact.'

reading B2

What is the main reason water is referred to as the 'universal solvent'?

Read this passage:

Water is often called the 'universal solvent' because of its ability to dissolve more substances than any other liquid. This property is crucial for life on Earth, as water dissolves nutrients, minerals, and other vital substances, making them accessible to living organisms. However, it's important to remember that 'universal' doesn't mean it dissolves everything; there are many substances that are insoluble in water.

What is the main reason water is referred to as the 'universal solvent'?

सही! बिलकुल नहीं। सही जवाब: It has the ability to dissolve a wider range of substances than other liquids.

The passage explains water is called the 'universal solvent' 'because of its ability to dissolve more substances than any other liquid.' It also clarifies that 'universal' doesn't mean it dissolves everything.

सही! बिलकुल नहीं। सही जवाब: It has the ability to dissolve a wider range of substances than other liquids.

The passage explains water is called the 'universal solvent' 'because of its ability to dissolve more substances than any other liquid.' It also clarifies that 'universal' doesn't mean it dissolves everything.

sentence order B2

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: Nail polish remover is a common type of solvent that can dissolve many substances.

This sentence describes a common household item that acts as a solvent, making it relevant to the definition.

sentence order B2

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: In chemistry, water is often referred to as the 'universal solvent' due to its ability to dissolve a wide range of substances.

This sentence highlights water as a significant solvent, aligning with the definition provided.

sentence order B2

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: When making tea, hot water acts as the solvent, extracting the flavors and compounds from the tea leaves.

This example uses a common scenario to illustrate the role of a solvent.

fill blank C1

The artist used a powerful chemical as a paint ___ to thin the oil paints for a more fluid application.

सही! बिलकुल नहीं। सही जवाब: solvent

A 'solvent' is a substance used to dissolve another substance, which fits the context of thinning paint. 'Diluent' is similar but 'solvent' is more precise in a chemical context. 'Catalyst' speeds up reactions, and 'pigment' is the color itself.

fill blank C1

In the pharmaceutical industry, finding the right ___ for a new drug compound is crucial for its solubility and bioavailability.

सही! बिलकुल नहीं। सही जवाब: solvent

A 'solvent' is essential for dissolving drug compounds. A 'precipitate' is a solid that forms from a solution, an 'emulsifier' helps mix immiscible liquids, and a 'reagent' is a substance used in a chemical reaction.

fill blank C1

The chemist carefully chose a non-polar ___ to extract the organic compounds from the aqueous solution.

सही! बिलकुल नहीं। सही जवाब: solvent

A 'solvent' is used to extract or dissolve other substances. 'Solute' is the substance being dissolved. 'Suspension' and 'colloid' refer to types of mixtures, not the dissolving agent.

fill blank C1

When cleaning delicate electronic components, it's vital to use a mild ___ that won't damage the circuitry.

सही! बिलकुल नहीं। सही जवाब: solvent

A 'solvent' is used to dissolve and remove dirt or residue. 'Abrasive' would scratch, 'corrosive' would damage, and while 'detergent' cleans, 'solvent' is more appropriate for dissolving substances in this technical context.

fill blank C1

Water is often called the 'universal ___' due to its ability to dissolve a wide range of substances.

सही! बिलकुल नहीं। सही जवाब: solvent

Water's ability to dissolve many substances makes 'solvent' the correct term. A 'catalyst' speeds up reactions, a 'medium' is an environment, and a 'reactant' is consumed in a reaction.

fill blank C1

The cleaning agent contained a powerful ___ that could effectively remove stubborn grease and oil stains.

सही! बिलकुल नहीं। सही जवाब: solvent

A 'solvent' is used to dissolve and remove grease and oil. An 'emulsion' is a mixture of two immiscible liquids, a 'precipitate' is a solid formed from a solution, and a 'surfactant' reduces surface tension.

listening C1

Listen for the action taken with the solvent.

सही! बिलकुल नहीं। सही जवाब: The chemist carefully poured the organic solvent into the beaker, ensuring not to spill any.
सही! बिलकुल नहीं। सही जवाब:
listening C1

Identify what is being separated from the solvent.

सही! बिलकुल नहीं। सही जवाब: A crucial step in the purification process involves separating the solute from the solvent through distillation.
सही! बिलकुल नहीं। सही जवाब:
listening C1

Consider why water is chosen as the solvent.

सही! बिलकुल नहीं। सही जवाब: For this experiment, water will serve as the universal solvent due to its polarity.
सही! बिलकुल नहीं। सही जवाब:
speaking C1

Read this aloud:

Could you explain the primary function of a solvent in a chemical solution?

Focus: primary function

सही! बिलकुल नहीं। सही जवाब:
speaking C1

Read this aloud:

Describe a real-world example where a solvent is used to achieve a specific outcome.

Focus: real-world example

सही! बिलकुल नहीं। सही जवाब:
speaking C1

Read this aloud:

Discuss the implications of choosing an inappropriate solvent for a particular chemical reaction.

Focus: implications of choosing

सही! बिलकुल नहीं। सही जवाब:
writing C1

Explain the significance of choosing the right solvent in pharmaceutical drug development, considering factors like solubility, reactivity, and safety.

Well written! Good try! Check the sample answer below.

Sample answer

In pharmaceutical drug development, the meticulous selection of a suitable solvent is paramount. Solubility dictates the concentration achievable for the active pharmaceutical ingredient (API), directly impacting dosage efficacy. Reactivity is another critical factor; an unsuitable solvent could chemically alter or degrade the API, compromising its therapeutic properties. Furthermore, safety considerations are non-negotiable, encompassing both the solvent's toxicity to humans and its environmental impact during manufacturing and disposal. A poorly chosen solvent can lead to inefficient synthesis, increased purification challenges, and ultimately, a compromised or unsafe drug product. Therefore, a comprehensive understanding of solvent properties is indispensable for successful drug formulation.

सही! बिलकुल नहीं। सही जवाब:
writing C1

Discuss the environmental implications of using various industrial solvents and propose sustainable alternatives or practices to mitigate their impact.

Well written! Good try! Check the sample answer below.

Sample answer

The widespread use of industrial solvents presents significant environmental challenges, including air and water pollution, ozone depletion, and the generation of hazardous waste. Many traditional solvents are volatile organic compounds (VOCs) that contribute to smog formation and respiratory issues. To mitigate these impacts, industries are increasingly exploring sustainable alternatives such as supercritical fluids (e.g., CO2), ionic liquids, and bio-based solvents derived from renewable resources. Furthermore, implementing 'green chemistry' principles, which focus on minimizing the use and generation of hazardous substances, can lead to more environmentally benign manufacturing processes. This includes optimizing reaction conditions to reduce solvent quantities, using closed-loop systems for solvent recycling, and developing solvent-free reactions where feasible. Adopting these practices is crucial for fostering a more sustainable industrial landscape.

सही! बिलकुल नहीं। सही जवाब:
writing C1

Analyze the role of solvents in modern analytical chemistry techniques, such as chromatography and spectroscopy, and how their properties influence the accuracy and sensitivity of these methods.

Well written! Good try! Check the sample answer below.

Sample answer

Solvents play an indispensable role in modern analytical chemistry, profoundly influencing the accuracy and sensitivity of techniques like chromatography and spectroscopy. In chromatography, the choice of solvent, particularly in the mobile phase, dictates the separation efficiency of analytes by modulating their interaction with the stationary phase. Factors such as solvent polarity, viscosity, and boiling point are critical for achieving optimal resolution and peak shape. In spectroscopy, the solvent can affect the absorption and emission characteristics of a substance, sometimes leading to solvatochromic shifts or quenching effects. Its transparency in the wavelength range of interest is also crucial to avoid interference. An unsuitable solvent can broaden spectral bands, reduce signal-to-noise ratios, or even react with the analyte, leading to inaccurate quantitative or qualitative analyses. Therefore, a meticulous selection of solvents, informed by their physical and chemical properties, is paramount for reliable analytical results.

सही! बिलकुल नहीं। सही जवाब:
reading C1

According to the passage, what is a key factor influencing the choice of solvent in polymer processing, besides simple dissolution?

Read this passage:

In the realm of materials science, the selection of an appropriate solvent for polymer processing is a nuanced decision with far-reaching consequences. The thermodynamic compatibility between the polymer and the solvent dictates the polymer's solubility and the subsequent properties of the fabricated material. Beyond simple dissolution, the solvent's ability to plasticize the polymer or influence its crystallization kinetics can profoundly impact the final mechanical strength, optical clarity, and thermal stability of the product. Furthermore, the solvent's volatility and toxicity must be carefully considered for environmental and safety reasons during manufacturing.

According to the passage, what is a key factor influencing the choice of solvent in polymer processing, besides simple dissolution?

सही! बिलकुल नहीं। सही जवाब: The solvent's ability to plasticize the polymer or influence its crystallization kinetics.

The passage states, 'Beyond simple dissolution, the solvent's ability to plasticize the polymer or influence its crystallization kinetics can profoundly impact the final mechanical strength, optical clarity, and thermal stability of the product.' This directly answers the question.

सही! बिलकुल नहीं। सही जवाब: The solvent's ability to plasticize the polymer or influence its crystallization kinetics.

The passage states, 'Beyond simple dissolution, the solvent's ability to plasticize the polymer or influence its crystallization kinetics can profoundly impact the final mechanical strength, optical clarity, and thermal stability of the product.' This directly answers the question.

reading C1

What role did solvents play in early photographic processes?

Read this passage:

The historical development of photography owes much to the discovery and application of various solvents. Early photographic processes, such as daguerreotypes and wet collodion, relied heavily on highly flammable and toxic solvents like ether and collodion dissolved in alcohol to prepare light-sensitive emulsions. The ongoing search for less hazardous and more efficient solvents has been a continuous thread in photographic innovation, leading to the development of safer alternatives and the advent of modern digital imaging, which has significantly reduced the reliance on chemical solvents.

What role did solvents play in early photographic processes?

सही! बिलकुल नहीं। सही जवाब: They were crucial for preparing light-sensitive emulsions.

The passage explicitly states, 'Early photographic processes... relied heavily on highly flammable and toxic solvents like ether and collodion dissolved in alcohol to prepare light-sensitive emulsions.'

सही! बिलकुल नहीं। सही जवाब: They were crucial for preparing light-sensitive emulsions.

The passage explicitly states, 'Early photographic processes... relied heavily on highly flammable and toxic solvents like ether and collodion dissolved in alcohol to prepare light-sensitive emulsions.'

reading C1

How does the choice of solvent impact the development of nanomaterials?

Read this passage:

The burgeoning field of nanotechnology frequently utilizes solvents in the synthesis and manipulation of nanomaterials. Whether it's for dispersing nanoparticles, mediating chemical reactions at the nanoscale, or creating self-assembling structures, the choice of solvent is paramount. The solvent's surface tension, polarity, and ability to stabilize nanoparticles against aggregation are critical parameters. A well-chosen solvent can facilitate precise control over the size, shape, and surface chemistry of nanomaterials, which in turn dictates their unique properties and potential applications in diverse fields from medicine to electronics.

How does the choice of solvent impact the development of nanomaterials?

सही! बिलकुल नहीं। सही जवाब: It allows for precise control over the size, shape, and surface chemistry of nanomaterials.

The passage states, 'A well-chosen solvent can facilitate precise control over the size, shape, and surface chemistry of nanomaterials, which in turn dictates their unique properties and potential applications.'

सही! बिलकुल नहीं। सही जवाब: It allows for precise control over the size, shape, and surface chemistry of nanomaterials.

The passage states, 'A well-chosen solvent can facilitate precise control over the size, shape, and surface chemistry of nanomaterials, which in turn dictates their unique properties and potential applications.'

sentence order C1

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: The chemist carefully measured the solvent into the beaker.

This order forms a grammatically correct and coherent sentence.

sentence order C1

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: Water is a universal solvent, dissolving many different substances.

This arrangement creates a logical and grammatically sound sentence describing water's properties.

sentence order C1

सेंटेंस बनाने के लिए नीचे शब्दों पर टैप करो
सही! बिलकुल नहीं। सही जवाब: Ensure proper ventilation when working with volatile solvents.

This sequence constructs a clear and imperative sentence about safety precautions.

fill blank C2

The chemist meticulously selected a highly potent ___ to ensure the complete dissolution of the crystalline compound.

सही! बिलकुल नहीं। सही जवाब: solvent

A solvent is a substance that dissolves another substance. In this context, a potent solvent is needed for complete dissolution.

fill blank C2

Despite numerous attempts, they couldn't find a suitable ___ that would effectively break down the stubborn resin without damaging the delicate antique.

सही! बिलकुल नहीं। सही जवाब: solvent

The context describes the need for a substance to break down a resin, which is the function of a solvent.

fill blank C2

The artist preferred working with oil paints, valuing their rich texture and the extended drying time afforded by their particular ___.

सही! बिलकुल नहीं। सही जवाब: solvent

In oil painting, a solvent is used to thin the paint and affects its drying time.

fill blank C2

The company's financial woes were compounded by its inability to find a viable ___ for its mounting debt, eventually leading to bankruptcy.

सही! बिलकुल नहीं। सही जवाब: solvent

In a financial context, 'solvent' refers to the ability to pay one's debts. The lack of a 'solvent' solution implies an inability to manage debt.

fill blank C2

To achieve the desired viscosity, the industrial engineer carefully adjusted the ratio of the polymer to the organic ___.

सही! बिलकुल नहीं। सही जवाब: solvent

A solvent is used to control the viscosity of polymers by dissolving them.

fill blank C2

The environmental regulations strictly controlled the disposal of industrial ___ due to their potential toxicity and impact on ecosystems.

सही! बिलकुल नहीं। सही जवाब: solvents

Industrial solvents are often toxic and require controlled disposal, aligning with environmental regulations.

multiple choice C2

The chemist meticulously selected a highly potent ___ to effectively dissolve the recalcitrant polymer, ensuring a homogeneous solution for further analysis.

सही! बिलकुल नहीं। सही जवाब: solvent

A solvent is the substance that dissolves another substance. In this context, a potent solvent is needed to dissolve the polymer.

multiple choice C2

Despite its efficacy, the industrial-grade ___ posed significant environmental concerns due to its volatile organic compound emissions, necessitating stringent disposal protocols.

सही! बिलकुल नहीं। सही जवाब: solvent

The sentence describes environmental concerns related to a substance used in industry that has volatile organic compound emissions, which points to a solvent.

multiple choice C2

In the realm of artisanal perfumery, ethanol often serves as the primary ___ for extracting the delicate aromatic compounds from botanicals, preserving their essence.

सही! बिलकुल नहीं। सही जवाब: solvent

Ethanol is used to dissolve and extract aromatic compounds, making it a solvent in this context.

true false C2

In a saturated solution, the solvent can still dissolve additional solute.

सही! बिलकुल नहीं। सही जवाब: गलत

A saturated solution is one in which the maximum amount of solute has been dissolved by the solvent at a given temperature, meaning it cannot dissolve additional solute.

true false C2

The polarity of a solvent is a critical factor in determining its ability to dissolve specific solutes.

सही! बिलकुल नहीं। सही जवाब: सही

The principle 'like dissolves like' indicates that polar solvents tend to dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes, making polarity a critical factor.

true false C2

Water is considered a universal solvent due to its capacity to dissolve a vast array of substances, both polar and some nonpolar.

सही! बिलकुल नहीं। सही जवाब: सही

Water's high polarity and ability to form hydrogen bonds allow it to dissolve many different substances, leading to its designation as a 'universal solvent'.

listening C2

Consider the context of alchemy and botanical extraction.

सही! बिलकुल नहीं। सही जवाब: The alchemist meticulously chose a potent solvent to extract the elusive essence from the rare botanical.
सही! बिलकुल नहीं। सही जवाब:
listening C2

Focus on the environmental implications of industrial solvents.

सही! बिलकुल नहीं। सही जवाब: Despite its efficacy, the industrial solvent posed significant environmental risks, necessitating stringent disposal protocols.
सही! बिलकुल नहीं। सही जवाब:
listening C2

Think about the role of solvents in complex chemical processes.

सही! बिलकुल नहीं। सही जवाब: In intricate chemical syntheses, the selection of an appropriate solvent is paramount, influencing reaction kinetics and product yield.
सही! बिलकुल नहीं। सही जवाब:
speaking C2

Read this aloud:

Elucidate the critical role of a solvent in mitigating intermolecular forces during crystallization processes.

Focus: elucidate, mitigating, intermolecular, crystallization

सही! बिलकुल नहीं। सही जवाब:
speaking C2

Read this aloud:

Discuss the ethical dilemmas associated with the widespread use of highly volatile organic solvents in various manufacturing sectors.

Focus: ethical, dilemmas, volatile, manufacturing, sectors

सही! बिलकुल नहीं। सही जवाब:
speaking C2

Read this aloud:

Propose alternative, more sustainable solvents for common laboratory procedures, justifying your choices based on green chemistry principles.

Focus: propose, alternative, sustainable, justifying, principles

सही! बिलकुल नहीं। सही जवाब:
writing C2

Discuss the nuanced implications of a society struggling to find a 'solvent' solution to deeply entrenched socio-economic disparities, considering both literal and metaphorical interpretations of the term.

Well written! Good try! Check the sample answer below.

Sample answer

In addressing profound socio-economic disparities, the quest for a 'solvent' solution often transcends mere financial remediation. Metaphorically, a truly solvent approach would involve a multifaceted amelioration, dissolving the systemic barriers that perpetuate inequality. However, many of these issues appear almost 'insoluble,' requiring a catalytic shift in societal paradigms rather than superficial adjustments. The conundrum lies in identifying an overarching principle or intervention that acts as a universal solvent, capable of breaking down complex, interwoven challenges without creating new ones.

सही! बिलकुल नहीं। सही जवाब:
writing C2

Analyze the historical significance of specific 'solvents' in scientific discovery and industrial advancement. Consider how these substances not only facilitated new chemical reactions but also enabled the creation of novel materials and processes that reshaped civilization.

Well written! Good try! Check the sample answer below.

Sample answer

Throughout history, the judicious application of various 'solvents' has been pivotal in scientific and industrial revolutions. From the ancient alchemists' pursuit of the 'universal solvent' to modern organic chemistry's reliance on precise solvents for synthesis, these liquids have been indispensable. They have enabled the extraction of precious metals, the purification of pharmaceuticals, and the creation of polymers that form the backbone of contemporary manufacturing. The ability of a solvent to facilitate transformation, by dissolving one substance to react with another, underscores its fundamental role in human innovation and technological progress.

सही! बिलकुल नहीं। सही जवाब:
writing C2

Compose an argumentative essay exploring the ethical considerations surrounding the use of powerful industrial 'solvents,' particularly concerning environmental impact, worker safety, and the long-term ecological consequences of their disposal or release.

Well written! Good try! Check the sample answer below.

Sample answer

The pervasive use of powerful industrial 'solvents' presents a formidable ethical dilemma, balancing economic utility against profound environmental and health risks. Many such substances are highly volatile, potentially carcinogenic, and contribute significantly to air and water pollution, posing immediate dangers to worker safety and long-term threats to ecosystems. The challenge lies in developing effective mitigation strategies and stringent regulatory frameworks that mandate responsible disposal, promote the development of greener alternatives, and enforce corporate stewardship. Without a concerted global effort, the cumulative ecological consequences of solvent contamination could prove irreversible, compromising planetary health for generations.

सही! बिलकुल नहीं। सही जवाब:
reading C2

Which of the following best describes the consequence of a nation being deemed 'insolvent' in international finance?

Read this passage:

In the realm of international finance, the term 'solvent' carries a profound weight. A nation or corporation deemed solvent possesses the capacity to meet its financial obligations, indicating robust economic health and stability. Conversely, an entity facing insolvency often triggers widespread economic anxiety, potentially leading to cascading failures across interconnected markets. The intricate dance of debt, assets, and liabilities determines this critical status, influencing investor confidence and global economic equilibrium.

Which of the following best describes the consequence of a nation being deemed 'insolvent' in international finance?

सही! बिलकुल नहीं। सही जवाब: It typically leads to widespread economic anxiety and potential market failures.

The passage states that 'an entity facing insolvency often triggers widespread economic anxiety, potentially leading to cascading failures across interconnected markets.'

सही! बिलकुल नहीं। सही जवाब: It typically leads to widespread economic anxiety and potential market failures.

The passage states that 'an entity facing insolvency often triggers widespread economic anxiety, potentially leading to cascading failures across interconnected markets.'

reading C2

According to the passage, what was the primary outcome of the historical pursuit of a 'universal solvent'?

Read this passage:

The concept of a 'universal solvent' has fascinated alchemists and chemists for centuries. While no single substance can dissolve everything without itself being dissolved (violating the laws of chemistry), the pursuit of such a solvent drove significant advancements in understanding chemical properties and reactivity. Modern chemistry recognizes that the effectiveness of a solvent is highly specific, dependent on the polarity and molecular structure of both the solvent and the solute, underpinning the vast diversity of chemical processes.

According to the passage, what was the primary outcome of the historical pursuit of a 'universal solvent'?

सही! बिलकुल नहीं। सही जवाब: A deeper understanding of chemical properties and reactivity.

The passage indicates that 'the pursuit of such a solvent drove significant advancements in understanding chemical properties and reactivity.'

सही! बिलकुल नहीं। सही जवाब: A deeper understanding of chemical properties and reactivity.

The passage indicates that 'the pursuit of such a solvent drove significant advancements in understanding chemical properties and reactivity.'

reading C2

In the metaphorical sense described, what characterizes a 'solvent' policy?

Read this passage:

Beyond its scientific definition, 'solvent' is often used metaphorically to describe solutions to complex problems, particularly in governance or social reform. A 'solvent' policy, in this context, effectively addresses root causes, rather than merely treating symptoms, leading to sustainable improvements. Such solutions require a comprehensive understanding of the problem's multifaceted nature, similar to how a chemical solvent interacts with various components of a mixture.

In the metaphorical sense described, what characterizes a 'solvent' policy?

सही! बिलकुल नहीं। सही जवाब: It effectively addresses root causes and leads to sustainable improvements.

The passage states that a 'solvent' policy 'effectively addresses root causes, rather than merely treating symptoms, leading to sustainable improvements.'

सही! बिलकुल नहीं। सही जवाब: It effectively addresses root causes and leads to sustainable improvements.

The passage states that a 'solvent' policy 'effectively addresses root causes, rather than merely treating symptoms, leading to sustainable improvements.'

/ 138 correct

Perfect score!

संबंधित सामग्री

यह शब्द अन्य भाषाओं में

science के और शब्द

acid

A1

यह एक रासायनिक पदार्थ है जिसका स्वाद आमतौर पर खट्टा होता है और यह चीज़ों को गला सकता है। विज्ञान में, यह सात से कम पीएच स्तर वाला तरल होता है।

algebra

A1

यह गणित की एक शाखा है जिसमें समीकरणों में अज्ञात संख्याओं को दर्शाने के लिए अक्षरों और प्रतीकों का उपयोग किया जाता है।

atom

A1

An atom is the smallest possible part of a chemical element. Everything in the world is made of millions of these very tiny particles.

atomic

A1

Atomic relates to the very small parts called atoms that make up everything in the world. It is often used to describe science, energy, or very small things.

calculus

A1

Calculus is a high-level branch of mathematics that studies how things change. It uses special symbols to calculate things like the speed of an object or the area of a shape.

catalyst

A1

A catalyst is something that makes a change happen faster or more easily. In science, it is a substance that speeds up a chemical reaction without being changed itself.

circuit

A1

सर्किट बिजली के बहने का एक पूरा रास्ता होता है। यह बिजली के आने-जाने का एक बंद रास्ता है।

circumference

A1

The circumference is the distance around the outside edge of a circle or a round object. It is a measurement that tells you how long the boundary of a round shape is.

constant

A1

A constant is something that stays the same and does not change. In science and math, it is a fixed number or a part of an experiment that is kept the same while other things vary.

decimal

A1

A decimal is a number that uses a dot to show parts of a whole. It is based on the number ten and helps show values smaller than one.

क्या यह मददगार था?
अभी तक कोई टिप्पणी नहीं। अपने विचार साझा करने वाले पहले व्यक्ति बनें!