Question

A metal compound A reacts with dilute hydrochloric acid to
produce effervescence. The gas evolved extinguishes a burning
candle.​

Answer 1

Answer:

Metal is -Zinc (Zn)

Explanation:

Zn+2Hcl= ZnCl2 +H2

HOPE IT HELPS!

Answer 2

Answer:

Let metal compound be Calcium carbonate CaCO2

Now,

CaCO2 + 2HCl - CaCl2 + CO2 + H2O

The gas is carbon dioxide CO2