1.

Generally, when metals are treated with mineral acids, hydrogen gas is liberated but when metals (except Mn and Mg) are treated with HNO_3, hydrogen is not liberated why?

Answer»

Solution :It is because `HNO_3` is a strong oxidising agent. It oxidises the `H_2` PRODUCED to `H_2O` and it self get REDUCED to any of the oxides of the nitrogen LIKE `NO_2,NO` etc.


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