Question

why plaster of Paris clay becomes hard after adding water?​

Answer 1

Answer:

When the plaster is mixed with water the process is reversed and the plaster returns to its original gypsum state and becomes hard.

formula in words=gypsum + heat = plaster.

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Answer 2

ANSWER

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Plaster of paris clay becomes harder because p it is converted into gypsum after adding water in it.This is the reason why plaster of paris become harder after some time.

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Charactristics of Plaster os Paris :-

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•Plaster of Paris is non flamable and non-combustible.

•It is very low reactive.

•It can acts as oxidising agent.

•It expands very slightly.

•It does not cracking surface. It gives a beautiful effect.

•It can be used in walls or surfaces.

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