Question

Why is HNO3 not forming salt and H2 gas with metals? Name two metals which react with HNO3 to
evolve H2 gas.

Answer 1

Answer:

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Explanation:

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). But magnesium (Mg) and manganese (Mn) react with very dilute HNO3 to evolve H2 gas.

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