Question

Generally when metals are treated with mineral acids, hydrogen gas is liberated but when metals are treated with HNO3 hydrogen gas is not liberated,why?

Answer 1

Thanks for asking the question.

Here's your answer

Generally when metals are treated with acids they give rise to hydrogen gas. But HNO3(nitric acid) is a strong oxidising agent which no metal has the ability to displace hydrogen from it.

I Hope this answer helps you.

Answer 2

HI

✨ Hydrogen gas is not evolved when metals are treated with nitric acid since :

⏺️ Nitric acid (HNO3) is a strong oxidising agent.

⏺️It oxidises the hydrogen produced to water and itself gets reduced to any of the nitrogen oxides. (N2O, NO, NI2)

Hope it proved to be beneficial....