Waec Chemistry 1988 Past Questions and Answers

Question 6:

• WAEC 1988

Which of the following compound is aromatic?

A. Benzene
B. Cyclobutane
C. Cyclopentane
D. Hexane
E. Ethene

Question 7:

• WAEC 1988

Which of the following does not affect the rate of a chemical reaction?

A. Addition or presence of a catalyst
B. Size of the reacting particles
C. The enthalpy change for the reaction
D. Concentration of the reactants
E. Temperatureat which the reaction is carried out

Question 8:

• WAEC 1988

Which of the following does not affect the rate of a chemical reaction?

A. Addition or presence of a catalyst
B. Size of the reacting particles
C. The enthalpy change for the reaction
D. Concentration of the reactants
E. Temperatureat which the reaction is carried out

Question 9:

• WAEC 1988

Given that 32.0g sulphur contains 6.02 x 10 23 sulphur atoms how many atoms are there in 2.70g of aluminium? {Al = 27, S =32}

A. 6.02 x 10 ²³
B. 3.01 x 10²²
C. 6.02 x 10²²
D. 5. 08 x 10²²
E. 3.01 x 10²²

Question 10:

• WAEC 1988

The empirical formula of hydrocarbon containing 0. 12 mole of carbon and 0.36 mole of hydrogen is

A. CH₂
B. CH₃
C. C₂H₂
D. C₂H₄
E. C₂H₆