Question

Dry hydrogen chloride has no action on dry litmus paper, but a solution of hydrochloric acid turns blue litmus paper red. Why is it so?

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Answer 1

Answer:

Explanation:

We know that the colour of litmus paper is changed by H + ions because of acid.

Dry HCL it does not dissociate to give H+ ions.

Acids dissociate to give ions only in the aqueous solution.

In this HCL is not in aqueous form nor litmus paper is wet, so the colour of litmus paper does not change

Answer 2

Answer:

bcoz acids only behave as acids when they are in contact with water. bcoz they diassociates hydrogen ion and behave as acids only in water

Explanation:

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