Test for Gases

Formulae of gas

100

What is the chemical formula of carbon dioxide gas?

CO₂

200

What is the chemical formula of oxygen and hydrogen gas?

O₂ and H₂

300

What is the chemical formula of ammonia gas?

NH₃

400

What is the chemical formula of carbon monoxide gas?

CO

Test for gas

100

To test for hydrogen gas you use?

lighted splint

200

To test for oxygen gas you use?

glowing splint

300

To test for carbon dioxide gas you use?

limewater

400

To test for ammonia gas you use?

damp red litmus paper

Observation

100

Observation for hydrogen gas test

Gas extinguish flame with a 'pop' sound

200

Observation for oxygen test

Gas relights glowing splint

300

Observation for carbon dioxide gas

Gas produce white precipitate in limewater.

400

Observation for ammonia gas.

Gas turns damp red litmus blue.