Q: Which one of the following materials is present in a guard tube (drying tube) that is used for preparation of HCl gas?
(a)Calcium chloride
(b)Calcium bromide
(c)Calcium iodide
(d)Calcium fluoride
Correct Answer: (a)
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Q: Which one of the following materials is present in a guard tube (drying tube) that is used for preparation of HCl gas?
Correct Answer: (a)