A gas is produced when cone. H2S04 is added to solid sodium chloride taken in a test tube


#1

A gas is produced when cone. H2S04 is added to solid sodium chloride taken in a test tube. The gas coming out through the delivery tube is passed over a dry blue litmus paper and then over a moist blue litmus paper. Record your observations and explain reason with the help of chemical equation.


#2

HCl gas is produced.

When the gas is passed through dry litmus paper, there is no change in colour because it cannot show acidic properties, as H+ ions are not present.
When the gas is passed through moist blue litmus paper, colour changes to red as it shows acidic properties. It happens because H+ ions are produced when HCl dissolves in water.