Question

which of the following is used to prepare hydrogen in laboratory
1) zinc
2) chlorine
3) oxygen
4) sulphur​

Answer 1

Answer:

(i) Hydrogen chloride gas is prepared by treating Sodium chloride with concentrated sulphuric acid. The HCl gas is passed through a drying agent to remove moisture where concentrated sulphuric acid plays the role of dehydrating agent as well.

(ii) NaCl+H

2

SO

4

→NaHSO

4

+HCl(g)

Answer 2

Answer :

Answer is 4) sulpuric

Explanation:

Hydrogen chloride gas is prepared by treating Sodium chloride with concentrated sulphuric acid. The HCl gas is passed through a drying agent to remove moisture where concentrated sulphuric acid plays the role of dehydrating agent as well.

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