Question

An aqueous solution turns red litmus blue. Excess addition of which of the following solution
Would reverse the change?
(a) Baking powder
(b) Lime
(c) Ammonium chloride
(d) Hydrochloric acid

Answer 1

d. hydrochloric acid

Answer 2

$\bf\huge\underline\purple{Answer}$

(d) Hydrochloric acid

Because the aqueous solution that turns red litmus solution blue is a base and the other options given are also basic compounds.