Q12 of 28 Page 14

Hydrogen gas is not evolved when most metals react with nitric acid'. State reasons to justify this statement.

As we know that nitric acid is a very strong oxidizing agent. When nitric acid reacts with any metal, the hydrogen gas produced get oxidized by nitric acid and as a result hydrogen gas converts into the water. For example:

Cu + HNO3→ Cu(NO3)2 + 2NO + 4H2O


In the above reaction, the nitric acid oxidizes hydrogen gas into water and nitric acid is itself reduced to nitrogen monoxide (NO)


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