Acids, bases and salts - Jamb Chemistry Past Questions and Answers

Question 56:

• 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 57:

• 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 58:

• JAMB 1990

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

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

Question 59:

• JAMB 1990

Sodium hydrogen should be stored in properly closed containers because it?

A. Readily asborbs water vapour to air
B. Is easily oxidize by atmospheric oxygen
C. Turns golden yellow when exposed to light
D. Melts at a low temperature

Question 60:

• JAMB 1990

To make coloured glasses, small quantities of oxides of metals which form coloured silicates are often added to the reaction mixture consisting of Na₂CO₃ and SiO₂. Such a metals is a?.

A. Pottasium
B. Barium
C. Zinc
D. Copper