Question

Litmus paper does not show any color change with

• A. acids
• B. alkalis
• C. bases
• D. salts

Answer 1

The correct option is D

salts

Explanation for the correct answer:

• Salts are formed by the neutralisation of an acid by a base or vice versa. As they are neutral or do not have an acidic or basic property, they do not change the color of the litmus paper.
• Litmus paper is an indicator of the acidic or basic property of the substance.

Explanation for the incorrect options:

• Acids turn red litmus paper blue.
• Alkalis also blue litmus paper red as alkali is a water-soluble base.
• Bases turn blue litmus paper red.

Therefore, option (d) is correct.