A metal on reaction with an acid liberates a gas which gives a pop sound when brought in contact with a flame. Identify the gas.

Oxygen gas

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Hydrogen gas

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Carbon dioxide gas

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Carbon monoxide gas

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Solution

The correct option is B
Hydrogen gas

Metals on reaction with acids liberate hydrogen gas. To test the hydrogen gas, a small fire/flame can be brought near to the hydrogen gas. The pop sound comes from the small explosion formed by the burning of hydrogen with oxygen.

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A metal on reaction with an acid, liberates a gas which gives a pop sound when brought in contact with a flame. Identify the gas?

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