Question

Gypsum $CaSO_{4}.2H_{2}O$ on heating to about $120^{o}C$ forms a compound which has the chemical composition represented by.

• A. $CaSO_{4}$
• B. $2CaSO_{4}.H_{2}O$
• C. $CaSO_{4}.H_{2}O$
• D. $2CaSO_{4}.3H_{2}O$

Answer 1

Answer: (B)

$2CaSO_{4}.H_{2}O$

Answer 2

Lithopone $(ZnS + BaSO_{4})$ is used as a white pigment.