Question

Generally, when metals are treated with mineral acids, hydrogen gas is liberated but when metals (except Mn and Mg), treated with HNO3, hydrogen is not liberated, why?

NCERT Class X
Science - Exemplar Problems

Chapter_Metals and Non Metals

Answer 1

Answer: Most of the metals do not react with HNO3 because nitric acid is a strong oxidizing agent. Hence, when metals (except Mn and Mg) are treated with nitric acid; hydrogen gas is not liberated.

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