Tests for gases Flashcards
1
Q
What is the test result for ammonia (NH3)?
A
Damp red litmus paper changes from red to blue
Ammonia is the only basic gas
2
Q
How can you test for carbon dioxide (CO2)?
A
Bubble the gas through limewater, which will turn from colourless to white precipitate
3
Q
What happens to litmus paper when tested with chlorine (Cl2)?
A
Damp red or blue litmus paper will be bleached (turn white)
4
Q
What sound indicates the presence of hydrogen gas (H2)?
A
‘Squeaky pop’ when a lighted splint is introduced
5
Q
What happens to a glowing splint in the presence of oxygen (O2)?
A
The glowing splint relights
6
Q
How is sulfur dioxide (SO2) tested?
A
Using acidified potassium manganate (VII) paper, which changes from purple to colourless
7
Q
Fill in the blank: Ammonia is the only ______ gas.
A
basic
