Ammonia, NH3 / The test for ammonia gas
1 mark · EasyState the colour change observed when ammonia gas is tested with damp red litmus paper.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
The red litmus paper turns blue.
Also accept: Turns blue; Changes to blue; Turns from red to blue
Common mistakes: Turns red; No change
Show mark scheme and worked solution
Marking points
B1 · 1 mark · Red litmus paper turns blue.
Worked solution
When ammonia gas is tested with damp red litmus paper, the paper turns blue.