1.

What is plaster of Paris and how is it prepared?

Answer»

`CaSO_4 . H_2O`
`CaSO_4 . 2H_2O`
`CaSO_4 . ""_2^1H_2O`
`CaSO_4 . 1 1/2 H_2O`

SOLUTION :`CaSO_4 . ""_2^1H_2O`


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