S Block Elements Question 128
Question: When a crystal of caustic soda is exposed to air, a liquid layer is deposited because :
Options:
A) Crystal loses water
B) Crystal absorbs moisture and $ CO_2 $
C) Crystal melts
D) Crystal sublimes
Show Answer
Answer:
Correct Answer: B
Solution:
[b] It is hygroscopic and deliquescent. It absorbs moisture and $ CO_2 $ to form $ Na_2CO_3 $
$ 2NaOH+CO_2\xrightarrow{{}}Na_2CO_3+H_2O $
BETA
