S Block Elements Question 214
Question: Gypsum $ CaSO_4.2H_2O $ on heating to about $ 120^{o}C $ forms a compound which has the chemical composition represented by
[CPMT 1978, 82, 88, 90; EAMCET 1978; DPMT 1982, 83; NCERT 1979]
Options:
A) $ CaSO_4 $
B) $ 2CaSO_4.H_2O $
C) $ CaSO_4.H_2O $
D) $ 2CaSO_4.3H_2O $
Show Answer
Answer:
Correct Answer: B
Solution:
$ 2\underset{Gypsum}{\mathop{(CaSO_4.2H_2O)}}\underset{Dehydration}{\mathop{\xrightarrow{120^{o}C}}}\ \underset{\text{Plaster of paris }}{\mathop{2CaSO_4.H_2O}}+3H_2O $
BETA
