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Laboratory Preparation

Which of the ...

Question

Which of the following is not an impurity present in hydrogen gas during the laboratory preparation of hydrogen?

A

Calcium Chloride

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B

Hydrogen Sulphide

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C

Sulphur Dioxide

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D

Carbon Dioxide

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Solution

The correct option is A
Calcium Chloride

During the laboratory preparation of hydrogen using zinc with dilute hydrochloric acid, the hydrogen gas evolved contains some impurities with it such as hydrogen sulphide $H_{2} S$ , Sulphur dioxide $S O_{2}$ , Carbon dioxide $C O_{2}$ , etc. but it does not contain calcium chloride.

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