Jamb Chemistry 1990 Past Questions and Answers

Question 11:

• JAMB 1990

The brown fumes given off when trioxonitrate (V) acid is heated consist of ?

A. NO₂ and O₂
B. H₂O and NO₂
C. NO_2' O₂ and H₂O
D. NO, NO₂ and H₂O

Question 12:

• 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 13:

• 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 14:

• 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 15:

• JAMB 1990

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

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