Question

metals displace hydrogen from acid whereas non metals do not why?
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Answer 1

Answer:

Hydrogen from dilute acids can only be replaced if electrons are supplied to H+ ions of the acid.

Metals have a tendency to lose electrons and hence they supply electrons, i.e., they are electron donors. That is why metals displace hydrogen from dilute acids.

On the other hand, non-metal is an electron acceptor. It cannot supply electrons to H+ and hence, it does not displace hydrogen from dilute acids.

Explanation:

Answer 2

most of the non metals are electronegetive in nature, so they tend to gain electrons in the chemical reactions. therefor they are less reactive than hydrogen. so they are not able to displace hydrogen form dilute acids.