Test for gases

Question 1

Test & Observation for
Carbon Dioxide (CO2)

Answer 1

Bubble it through limewater (it turns milky).
A white precipitate is formed.

Question 2

Test & Observation for
Hydrogen(H2)

Answer 2

Place a lighted splint.
It goes off with a “pop” sound.

Question 3

Test & Observation for
Oxygen (O2)

Answer 3

It relights a glowing splint.

Question 4

Test & Observation for
Ammonia (NH3)

Answer 4

It turns moist red litmus paper blue.

Question 5

Test & Observation for
Chlorine (Cl2)

Answer 5

It turns moist blue litmus paper red (because it is acidic in nature)

Question 6

Test & Observation for
Sulfur Dioxide (SO2)

Answer 6

It turns acidified Potassium Manganate (V||) from purple to colourless