Question

why some metal don't release hydrogen gas​

Answer 1

Answer:

it has sd defects

Explanation:

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Answer 2

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

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