Jamb Chemistry 1984 Past Questions and Answers

Question 26:

• JAMB 1984

Alkaline hydrolysis of naturally occurring fats and oils yields

A. Fats and acids
B. Soaps and glycerol
C. Margarine and butter
D. Esters
E. Detergents

Question 27:

• JAMB 1984

Which of the following statements is INCORRECT?

A. Fractional distillation of crude petroleum will give the folloing hydrocarbon fuels in order of increasing boiling point
B. Butane < petrol < kerosene of polythene.
C. Both but-1-ene and but-1-yne will decolorize bromine readily
D. But-2-ene will react with chlorine to form 2,3-dichlorobutane
E. Calcuim carbide will react with water to form any alkyne

Question 28:

• JAMB 1984

Which of the following statements is NOT correct about all four of the acids: HBr, HNO₃, H ₂CO₃ and H₂SO₄? They

A. Dissolve marble to liberate CO
B. Have a PH less than 7
C. Turn blue litmus red
D. Neutralize alkalis to form salt
E. React with magnesium to liberate hydrogen

Question 29:

• JAMB 1984

If the cost of electricity required to deposit 1 g of magnesium is N5.00, how much would it cost to deposit 10g of aluminium?

A. N 10.00
B. N27.00
C. N44.44
D. N66.67
E. N33.33

Question 30:

• JAMB 1984

Nitrogen can best be obtained from a mixture over oxygen and nitrogen by passing the mixture over

A. Potassium hydroxide
B. Heated gold
C. Heated magnesium
D. Heated phosphorus
E. Calcium chloride