why does nitric acid not produce hydrogen gas by reacting with metals except magnesium and manganese?
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Nitric acid is a strong oxidizing agent.
So, when it reacts with any metal then it starts to oxidise the hygrogen gas to become water and then itself gets reduced to any simple nitrogen oxides like nitrous oxide , nitrogen dioxide etc.
However, Nitric acid can evolve Hydrogen gas when made to react as in a very dilute solution.
So, when it reacts with any metal then it starts to oxidise the hygrogen gas to become water and then itself gets reduced to any simple nitrogen oxides like nitrous oxide , nitrogen dioxide etc.
However, Nitric acid can evolve Hydrogen gas when made to react as in a very dilute solution.
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Answer:
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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