Question

Metals replace hydrogen from acids whereas non metals do not. Give reason

Answer 1

Answer:

Non-metals do not displace hydrogen from dilute acids is because unlike metals, non-metals do not have a tendency to lose electrons but to gain electrons. ... These electrons, which are readily lost by reactive metals like sodium, potassium etc are accepted by hydrogen ions of the acids, reducing them to hydrogen gas (H2)

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Answer 2

Explanation:

Metals are the species which tend to lose electrons in order to attain stability. When these metals react with an acid then hydrogen atoms gains the electrons donated by the metal atom. Therefore, hydrogen atom is liberated out.

For example, $Mg + 2HCl \rightarrow MgCl_{2} + H_{2}$

On the other hand, non-metals are the species which tend to gain electrons in order to attain stability. So, when they react with acids then no reaction takes place.

For example,    $N_{2} + HCl \rightarrow \text{no reaction}$

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