Question

An aqueous solution turns red litmus solution blue. Excess
addition of which of the following solutions would reverse the
change?
(a) Ammonium hydroxide solution (b) Baking powder
(d) hydrochloric acid
OR
(c) Lime​

Answer 1

(d) Hydrochloric Acid

The aqueous solution is of basic nature since red litmus changes to blue. The reaction can be reversed (to change to acidic solution) by adding excess of hydrochloric acid.

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Answer 2

The correct answer is option (c) Lime

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