Question 636:

• JAMB 1990

Which of the following tests will completely identify anyone of surphur (VI) oxide, hydrogen, carbon (IV) oxide and nitrogen (II) oxide?

A. Pass each gas into water and test with blue litmus paper
B. Pass each gas into lime water
C. Expose each gas to atmospheric air
D. Pass each gas to concentrated tetraoxosulphate (IV) acid

Question 637:

• JAMB 1990

In the Haber process for the manufacture of ammonia, the catalyst commonly used is finely divided ?

A. Vanadium
B. Platinum
C. Iron
D. Copper

Question 638:

• JAMB 1990

A metallic oxide which reacts with both HCl and NaOH to give salt and water only can be classified as?

A. An acidic oxide
B. A basic oxide
C. A neutral oxide
D. An amphoteric oxide

Question 639:

• JAMB 1990

Which of the following metals will liberate hydrogen from steam or dilute acid?

A. Copper
B. Iron
C. Lead
D. Mercury

Question 640:

• JAMB 1990

Coal fire should not be used in poorly ventilated rooms because ?

A. Of the accumulation of CO₂ which causes dep sleep
B. It is usually too hot
C. Of the acumulation of CO which causes suffocation
D. It removes most most of the gases in the rooms