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

(A) Baking powder

(B) Lime

(C) Ammonium hydroxide solution

(D) Hydrochloric acid



Naturals Indicators-Teachoo.jpg

An aqueous solution of base turns red litmus blue

Therefore, the addition of an acid will lead to the reversal of this change because it will neutralise the base .


Among the given options, the only acid is hydrochloric acid .


So, the correct option is (d) Hydrochloric acid.

  1. Class 10
  2. Chapter 2 Class 10 - Acids, Bases and Salts (Term 1)

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CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo