Question

metals react with dilute HCl and H2SO4 to give salt and H2 gas, but they dont produce H2 gas with dilute HNO3. give reason​

Answer 1

Explanation: When metals react with nitric acid hydrogen gas is liberated. Nitric acid is a very strong oxidizing agent. So , it oxidizes the hydrogen gas formed during the reaction to form water and an oxide of nitrogen ( NO,N2O,NO2 etc. )

Answer 2

This happens because -

• Metals that react with dilute nitric acid do not produce hydrogen gas since nitric acid is a strong oxidizing agent.
• Nitric acid oxidizes hydrogen gas produced by the reaction of a metal with dilute nitric acid to water as soon as it is formed.
• The formation of hydrogen gas is revealed by the reaction between very dilute nitric acid and magnesium and manganese.

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