The difference of number of water molecules in gypsum and plaster of Paris is
A.
$$\frac{5}{1}$$
B.
$$2$$
C.
$$\frac{1}{2}$$
D.
$$1\frac{1}{2}$$
Answer :
$$1\frac{1}{2}$$
Solution :
Gypsum is $$\,CaS{O_4}.2{H_2}O,$$ where as plaster of paris is $$\,CaS{O_4}\,\frac{1}{2}{H_2}O.$$
No. of water $$ = \left( {2 - \frac{1}{2}} \right) \to \frac{3}{2}\,{\text{or}}\,1\frac{1}{2}$$ molecules
Releted MCQ Question on Inorganic Chemistry >> S - Block Elements
Releted Question 1
A substance absorbs $$C{O_2}$$ and voilently reacts with water. The substance is