Which gas is evolved when acids react with metal carbonates?

$C O_{2}$

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$H_{2}$

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$N H_{3}$

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$O_{2}$

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Solution

The correct option is A
$C O_{2}$

Metal carbonates on reaction with acids give $C O_{2}$ .
$C a C O_{3} + 2 H C l \to C a C l_{2} + H_{2} O + C O_{2}$

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Which gas is evolved when acids react with metal carbonates?

The correct option is A CO2 Metal carbonates on reaction with acids give CO2. CaCO3+2HCl→CaCl2+H2O+CO2

The correct option is A
$C O_{2}$

Metal carbonates on reaction with acids give $C O_{2}$ .
$C a C O_{3} + 2 H C l \to C a C l_{2} + H_{2} O + C O_{2}$