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NEET levelSingle correct optionDifficulty 1 of 3sb084

The chemical formula of gypsum is

A $MgSO X_{4} \cdot 7 H X_{2} O$
B $CaSO X_{4} \cdot H X_{2} O$
C $(CaSO X_{4}) X_{2} \cdot H X_{2} O$
D $CaSO X_{4} \cdot 2 H X_{2} O$

Answer: D

Gypsum is calcium sulphate dihydrate,

CaSO X_{4} \cdot 2 H X_{2} O

. The hemihydrate

(CaSO X_{4}) X_{2} \cdot H X_{2} O

is plaster of Paris and

MgSO X_{4} \cdot 7 H X_{2} O

is Epsom salt.

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