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

An aqueous solution turns red litmus solution blue. Excess addition of

1.	An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
Answer» BAKING powder Lime Ammonium hydroxide solution Hydrochloric acid Solution :Since, the aqueous solution turns red litmus solution BLUE. So it is a basic compound. An acid solution (HCI) WOULD reverse the change. That is HCI would turn blue litmus solution to red. Other options baking powder, lime and ammonium hydroxide solution are basic compounds.So the blue litmus solution would not change the colour by adding these compounds.