An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
  1. Baking powder
  2. Lime
  3. Ammonium hydroxide solution
  4. Hydrochloric acid

AcademicChemistryNCERTClass 10

Correct Answer: (d) Hydrochloric acid

Explanation:  Hydrochloric acid solution turns red litmus to blue. On adding excess it reverses the effect.

Updated on 10-Oct-2022 13:27:10