Why magnesium when react with nitric acid evolve hydrogen gas but some metal do not?

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Solution

Dear student,

Metals react with acids to form metal salts and release hydrogen gas but not with dilute nitric acid. this is because HNO₃ is a strong oxidizing agent. It oxidises the hydrogen to form water and itself gets reduced to an oxide of nitrogen such as NO, NO₂, etc. magnesium and manganese are the only two metals that react with HNO₃ to release hydrogen gas

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