मुखवटा चढवणे

Not necessarily. While it can mean deception, it often refers to social etiquette or hiding pain to avoid worrying others.

No, for makeup use 'makeup karne'. Using this idiom for makeup would imply the makeup is a total fake identity.

'Song anne' is more like 'pretending' or 'acting like someone else', while 'mukhavata' focuses on the emotional barrier.

It remains 'तिने मुखवटा चढवला' because the verb agrees with the masculine noun 'मुखवटा'.

Yes, very frequently to describe professional personas or 'corporate masks'.

Yes, it is grammatically correct, but 'चढवणे' is the more idiomatic and common choice.

It means to take off the mask, either by revealing your own feelings or exposing someone else's lie.

Yes, especially because of the folk theater traditions prevalent in rural areas.

Usually, children are considered too innocent for this. You might use 'song anne' for a child pretending to sleep.

त्याने दयाळूपणाचा मुखवटा चढवला आहे.

Younger people might say 'Fake face dakhvane', but 'mukhavata' is still widely understood.

In a literal sense, yes (putting masks on idols), but the idiom is purely secular and psychological.

Yes: 'त्यांनी मुखवटे चढवले' (They put on masks). Note that 'mukhavata' becomes plural 'mukhavate'.

It is neutral. You can use it with friends or in a newspaper editorial.