Q. Setting of plaster of Paris involves
A) Oxidation with atmospheric oxygen
B) Combination with atmospheric $CO_{2}$
C) Dehydration
D) Hydration to yield another hydrate
Explanation
(d)
On hydration plaster of Paris, converts into gypsum.
$CaSO_{4}\ .\frac{1}{2}H_{2}O + \frac{3}{2}H_{2}O\ \rightarrow CaSO_{4}\ .\ 2H_{2}O\$
plaster of Paris gypsum
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.