Question

A solution of sodium chloride will:

• A. turn red litmus blue
• B. turn blue litmus red
• C. turn red litmus orange
• D. not change the colour of either red or blue litmus

Answer 1

The correct option is D not change the colour of either red or blue litmus

Litmus paper can be used as an indicator to know whether a given substance is acidic, basic or neutral in nature.

Acidic substances turn blue litmus paper red but they have no effect on the red litmus paper.

Basic substances turn red litmus paper blue but have no effect on the blue litmus paper.

On the other hand, neutral substances have no effect on the blue as well as the red litmus paper.

Hence, the correct answer is option (D).