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Why does dry HCl gas not change the colo...

Why does dry HCl gas not change the colour of the dry litmus.

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Dry HCl gas does not change the colour of dry blue litmus paper . Give reasons.

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Sugandha prepares HCl gas in her school laboratory using certain chemicals, She puts both dry and wet blue litmus paper in contact with the gas. (i) Name the reagents used by Sugandha to prepare HCl gas. (ii) State the colour changes observed with the dry and wet blue litmus paper. Show the formation of ions when HCl gas combines with water.