Question

Name the gas evolved when dilute HCl reacts with sodium hydrogencarbonate. How is it recognised

Answer 1

Hola.....

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QUESTION:- Name the gas evolved when dilute HCl reacts with sodium hydrogencarbonate. How is it recognised

ANSWER:- the gas evolved when dil HCL reacts with sodium hydrogen carbonate is CO2 gas (carbon dioxide)

It is recognised by

Passing it through a lime water

=> this lime water will turn its colour milky
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Hope it helps

Answer 2

When dilute HCL reacts with sodium hydrogen carbonate ,then carbon dioxide gas is formed.

NaHCO3 + 2HCL = 2 NaCl + H2O + CO2.

To recognize the gas, we can see brisk effervescence of carbon dioxide gas or bubbles is seen.

To test its presence,then lime water should be passed ,then we can observe that lime water turns milky,which indicates that CO2 is released.

Hope it helps  u!!!