Chemistry and Industry - Jamb Chemistry Past Questions and Answers

Question 56:

• JAMB 1991

Which of the following salts can be melted without decomposition?

A. Na₂CO₃
B. CaCO₃
C. MgCO₃
D. ZnCO₃

Question 57:

• JAMB 1991

Copper (II) tetraoxosulphate (IV) is widely used as a?

A. Fertilizer
B. Fungicide
C. Disinfectant
D. Purifier

Question 58:

• JAMB 1991

Copper (II) tetraoxosulphate (IV) is widely used as a?

A. Fertilizer
B. Fungicide
C. Disinfectant
D. Purifier

Question 59:

• JAMB 1991

Which of the following statements is TRUE of the complete hydrolysis of a glycerine by sodium hygroxide?

A. 3 moles ofNaOH are required for each mole of glyceride
B. 3 moles of glycerol are produced
C. Only one mole of soap is formed
D. Concentrated H₂SO₄ is essential for the completion of the reaction

Question 60:

• JAMB 1991

50 cm³ of sulphur (lV) oxide, 800 cm³ of carbon (IV) oxide will respectively saturate 1.0cm³ of water at 15^oC. Which of the following is suitable for demonstrating the fountain experiment?

A. Sulphur (IV) oxide and hydrogen chloride.
B. Carbon (IV) oxide and ammonia
C. Ammonia and hydrogen chloride
D. Carbon (IV) oxide and Sulphur (IV) oxide