A gas is produced when conc. H₂SO₄ is added to solid sodium chloride solution 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. What would you observe? Give reason for your observation and write the corresponding balanced chemical equation.
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HCl gas is produced.2NaCl + H2SO4 → Na2SO4 + 2HClThe gas when passed through dry litmus paper will show no change in colour because it cannot show acidic properties as H+ is not present.The gas when passed through moist litmus paper will show colour change to red.It shows acidic properties because H+ ions are produced when HCl dissolves in water.
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=}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.
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