Question

What do we observe on pouring acetic acid on red and blue litmus paper?

• A. Red litmus remains red and blue litmus turns red.
• B. Red litmus turns blue and blue litmus remains blue.
• C. Red litmus turns blue and blue litmus turns red.
• D. Red litmus becomes colourless and blue litmus remains blue.

Answer 1

The correct option is A Red litmus remains red and blue litmus turns red.

Acid turns blue litmus red and has no effect on red litmus. Hence, when acetic acid poured on blue litmus turns red whereas red remains red.