1.

Name the gas evolved when dilute HCl reacts with sodium hydrogen carbonate . How is it recognized

Answer» HII There!!

HCl+NaHCO3 ----> NaCl+ CO2+H2O

Therefore, Carbondioxide gas is evolved.

When the gas is evolved in the above REACTION passed through the lime water. It TURNS lime water milky.
So, the gas is CO2.


Hope it helps


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