If climate is humid, the gas evolved is passed through a guard tube containing:
A. Calcium hydroxide
B. Calcium carbonate
C. Calcium sulphate
D. Calcium chloride
Answer:D
If climate is humid, the gas evolved is passed through a guard tube containing:
A. Calcium hydroxide B. Calcium carbonate C. Calcium sulphate D. Calcium chloride
Explanation: During the preparation of hydrogen chloride gas, the gas is usually passed through the guard tube containing calcium chloride during humid climate, as calcium chloride is a good drying agent and absorbs moisture from the gas.