NCERT Exemplar Solutions
Class 10 - Science - CHAPTER 2: Acids, Bases and Salts - Multiple Choice Questions
Question 2

Question. 2

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

(c)

Ammonium hydroxide solution

(d)

Hydrochloric acid

Detailed Answer with Explanation:

Steps: Red → blue shows the solution is basic. Adding an acid (HCl) will neutralise the base and revert litmus to red. Hence hydrochloric acid.