When zinc metal is treated with a dilute solution of a strong acid, a gas is evolved, which is utilised in the hydrogenation of oil. Name the gas evolved.

Carbon dioxide

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Hydrogen

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Oxygen

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Methane

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Solution

The correct option is D Hydrogen
Zinc metal gives hydrogen gas when it is treated with dilute sulphuric acid. Hydrogen gas is utilized in hydrogenation of oil.
$Z n + 2 H C l \to Z n C l_{2} + H_{2}$
Therefore, the gas evolved is hydrogen.
Test for hydrogen gas: When a burning candle is brought near the hydrogen gas, it burns with pop sound which confirms the presence of hydrogen gas.

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