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Q.

Why hydrogen does not evolve when a metal reacts with nitric acid?

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a

Metal is reducing agent

b

Nitric acid is oxidizing agent

c

Nitric acid is reducing agent

d

Metal is oxidizing agent

answer is A.

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Detailed Solution

Hydrogen gas is not evolved when a metal reacts with nitric acid. It is because HNO3 is a strong oxidizing agent. It oxidizes the H2 produced to water and itself gets reduced to any of the nitrogen oxides (N2O, NO, NO2).

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