Metals replace hydrogen atoms from acids but non-metals do not. Why?

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Solution

Hydrogen gas can be replaced only by 2 types of elements a) they must form +ve ions and b) must be more reactive than Hydrogen

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Why is it that non metals do not displace hydrogen from dilute acids?

Q. Non-metals do not displace hydrogen from acids. It means that they do not react with:

Q. Why do non-metals not react with acids?

Nitric acid, even in its diluted form, is not used in the preparation of hydrogen from metals because metals on reaction with nitric acid can't replace the hydrogen atom.

(a) Explain why metals usually do not liberate hydrogen gas with dilute nitric acid.
(b) Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.

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