Question

Why nitric acid is not used in preparation of hydrogen sulfide?

Answer 1

Answer:

Nitric acid not used in the laboratory preparation of hydrogen. This is because nitric acid is a strong oxidising agent, and oxidises hydrogen gas to convert it into the water. ... sulphuric acid and dilute hydrochloric acid do not oxidise hydrogen into water hence preferred for the preparation of hydrogen gas.

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Answer 2

Explanation:

Because the nitric acid is strong oxidizing agent and oxidizes hydrogen gas to convert into water.