Question
Mg and Mn react with 5% HNO, to form H2(g). [True/ False]

Answer

True.
Explanation:
Nitric acid (HNO3) is a strong oxidising agent. So as soon as hydrogen gas is formed in the reaction it gets oxidised into HNO3 by Nitric acid and it (nitric acid) itself gets reduced into NO2, NO2 or NO.

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