Air As A Mixture And Some Uses Of The Noble Gas - Chemistry Jamb Past Questions and Answers

Question 1 :

• JAMB 1978

When air which contains the gases Oxygen, nitrogen, carbondioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are;

A. Nitrogen and carbondioxide
B. The rare gases
C. Nitrogen and oxygen
D. Nitrogen and the rare gases
E. Nitrogen, carbondioxide and the rare gases

Question 2 :

• JAMB 1978

You are provided with five gas jars containing SO₂, CO₂, H₂, CO and NO respectively. Select a test from A to E which will identify ANY ONE of the gases completely

A. Pass each gas into lime water
B. Pass each gas into water and test with litmus paper
C. Pass each gas into concentrated sulphuric acid
D. Expose each gas to atmospheric air
E. Expose each gas to fumes of hydrogen chloride