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A metal compound A reacts with dilute HCl to produce effervescence, and the gas evolved extinguishes a burning candle. The gas is

Question
A metal compound A reacts with dilute HCl to produce effervescence, and the gas evolved extinguishes a burning candle. The gas is
H2
CO2
O2
N2
Answer
CO2
Detailed Explanation
A gas that is produced with effervescence from a metal compound and extinguishes a flame is carbon dioxide, typical of carbonates reacting with acids.
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