Question

Chemical test to distinguish between HCl and hydrogen sulphide gas

Answer 1

HCl gas reacts with water to from HCl acid. On the other hand H2S gas reacts with water and furnish sulfur ions in the solution.

HCl + H2O → H3O+ + Cl-

H2S + 2H2O → 2H3O+ + S2-

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Answer 2

Answer:   Another way easy to remember.