Question

If vapours of dry ammonia gas are brought into contact with red litmus paper, what happens to the colour of the litmus paper?

• A. Litmus paper turns blue.
• B. Litmus paper turns red.
• C. No change in the litmus paper.
• D. Litmus paper turns yellow.

Answer 1

The correct option is C No change in the litmus paper.

The colour of the litmus paper remains unchanged because ammonia $N{H}_3$ gas does not act as a base in the absence of water.