Waec Chemistry Past Questions and Answers

Question 6:

• WAEC 1988

Equilibrium is said to be attained in reversible reaction when

A. All the reactants have been used up
B. All the products have been formed
C. There is no further change in temperature
D. The rates of the forward and backward reactions are equal
E. The rate of formation of the products decreases with time

Question 7:

• WAEC 1988

An acid present in proteins is

A. Lactic acid
B. Amino acid
C. Propanoic acid
D. Palmitic acid
E. Stearic acid

Question 8:

• WAEC 1988

The following are uses of sulphur except

A. Manufacture of tetraoxosulphate (VI) acid
B. Prevention of the growth of fungi
C. Vulcanization rubber
D. Manufacture of dyes
E. Coating of steel to prevent rusting

Question 9:

• WAEC 1988

The reaction represented by the equation NaOH_(aq) + HCI_(aq) → NaCI_(aq) + H₂O_(/)

A. Is a double decomposition
B. Is a neutralization
C. Is reversible
D. Is usually catalysed
E. Attains equilibrium after a few seconds

Question 10:

• WAEC 1988

Which of the following compound is aromatic?

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