An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?

(a) Baking powder
(b) Lime water
(c) Ammonium hydroxide solution
(d) Hydrochloric acid

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Solution

Since the aqueous solution turns red litmus solution blue, it's basic in nature. HCI, an acid would reverse the change. It would turn blue litmus solution to red.
Other options baking powder, lime water, and ammonium hydroxide solution are basic in nature. So, no change would be observed.

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Q. Question 02.
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An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change? (a) Baking powder (b) Lime water (c) Ammonium hydroxide solution (d) Hydrochloric acid

Since the aqueous solution turns red litmus solution blue, it's basic in nature. HCI, an acid would reverse the change. It would turn blue litmus solution to red. Other options baking powder, lime water, and ammonium hydroxide solution are basic in nature. So, no change would be observed.

An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?

(a) Baking powder
(b) Lime water
(c) Ammonium hydroxide solution
(d) Hydrochloric acid

Since the aqueous solution turns red litmus solution blue, it's basic in nature. HCI, an acid would reverse the change. It would turn blue litmus solution to red.
Other options baking powder, lime water, and ammonium hydroxide solution are basic in nature. So, no change would be observed.