Question

What is plaster of paris

Answer 1

a white powder that sets to a hard solid when mixed with water, used for making sculptures and casts, as an additive for lime plasters, and for making casts for setting broken limbs. It is usually the hemihydrate of calcium sulphate, 2CaSO4.H2O....
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Answer 2

It is a soft mixture of sand & cement & sometimes lime with water, for spreading on walls, ceilings or other structures to form a smooth hard surface when dried.