Answer the following: (i) Dry ammonia has no action on litmus paper but a solution of ammonia in water turns red litmus paper blue. Why is it so?

Answer the following:
(i) Dry ammonia has no action on litmus paper but a solution of ammonia in water turns red litmus paper blue. Why is it so?
(ii) What is the colour of methyl orange in baking soda?

(i) Dry ammonia produces no hydroxide ions (OH-).
Therefore, red litmus paper does not turn blue. But a solution of ammonia in water contains OH- ions.

Therefore, red litmus turns blue.
(ii) Baking soda provides a basic medium. Hence, colour of methyl orange will be yellow.
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