Generally gas 'G' is evolved when reactive metals react with dilute acids. Gas 'G' burns with a pop sound. Gas 'G' is

O_{2}

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C O_{2}

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C O

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H_{2}

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Solution

The correct option is D
$H_{2}$
Metals react with dilute acids to form a salt and liberate hydrogen gas $(H_{2})$ . Hydrogen gas burns with a pop sound when a burning candle is brought near the mouth of the test tube containing the reaction mixture.

Hence, the correct answer is option (a).

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