Aluminium easily liberates hydrogen gas on reaction with :

concentrated sulphuric acid

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concentrated nitric acid

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dilute hydrochloric acid

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none of the above

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Solution

The correct option is D dilute hydrochloric acid
A. Concentrated sulphuric acid reacts with aluminium to produce sulphur dioxide and aluminium sulphate.
B. Aluminum react with nitric acid to produce aluminum nitrate, nitrogen dioxide and water.
C. Aluminium metal react with dilute HCl to give a salt and hydrogen gas.
$2 A l + 6 H C l_{(d i l)} \to 2 A l C l_{3} + 2 H_{2} ↑$

Hence, option C is correct.

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