In which of the following chemical reactions hydrogen gas will not produce?

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Copper reacts with dilute sulphuric acid

Sodium reacts with water

Zinc reacts with dilute hydrochloric acid

Aluminium reacts with sodium hydroxide

answer is C.

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Detailed Solution

Copper reacts with dilute sulphuric acid, $H_{2}$ gas does not liberates because copper is less reactive than hydrogen, instead of that, $S O_{2}$ gas is liberated.

$3 C u + 4 H_{2} S O_{4} \to 3 C u S {O_{4}}_{(a q)} + S O_{2} ↑ + 2 H_{2} O_{(l)}$

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