Mercury does not reacts with sulphuric acid. This happens because:-

mercury is a liquid.

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sulphuric acid is a weak acid.

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mercury is more reactive than hydrogen.

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mercury is less reactive than hydrogen.

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Solution

The correct option is D
mercury is less reactive than hydrogen.

Mercury is less reactive than hydrogen. So, it is not able to displace hydrogen atoms from the sulphuric acid.

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Mercury + sulphuric acid $\to$ No reaction. This is because

A metal less reactive and another metal more reactive than hydrogen are
(a) aluminium and lead (b) iron and magnesium

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