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Question

When nitric acid reacts with metals, hydrogen gas is not observed because:


A

Hydrogen gas is not releases

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B

Hydrogen is oxidised by nitric acid

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C

Metal weakly react with nitric acid

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D

All of the above

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Solution

The correct option is B

Hydrogen is oxidised by nitric acid


Nitric acid is a strong oxidising agent. So as soon as hydrogen gas is formed in the reaction between a metal and nitric acid, the nitric acid oxidises hydrogen gas to water and gets reduced to any of the nitrogen oxides. Thus nitric acid does not release hydrogen gas upon reaction with metals.


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