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Question

Iron can liberate H2 from dil. H2SO4 but copper cannot liberate H2 from dil. H2SO4.
Why?

A
Fe is more reactive than hydrogen.
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B
Fe is less reactive than hydrogen.
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C
Cu is less reactive than hydrogen.
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D
Cu is more reactive than hydrogen.
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Solution

The correct option is C Cu is less reactive than hydrogen.
Iron can liberate H2 from dil. H2SO4 but copper cannot liberate H2 from dil. H2SO4. This happens because Fe is more reactive than hydrogen. It can thus displace hydrogen from sulphuric acid and form iron sulphate. Whereas copper is less reactive than hydrogen so, it cannot displace hydrogen from sulphuric acid.

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