Which gas is released when acid reacts with metals?

Hydrogen

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Nitrogen

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Oxygen

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Carbon

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Solution

The correct option is A
Hydrogen

An acid reacts with a metal and gives a salt with evolution of hydrogen gas.
$Acid + metal \to salt + H_{2}$

Many reactive metals like sodium, potassium, etc. displace hydrogen from acids.

$2 H C l + 2 N a \to 2 N a C l + H_{2}$

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