Waec Chemistry 1988 Past Questions and Answers

Question 16:

• WAEC 1988

Which of the following statements is not correct?

A. Carbon exhibits allotropy
B. Sulphur exhibits allotropy
C. Chlorine exhibits allotopy
D. Nitrogen is a gas
E. Argon is a noble gas

Question 17:

• WAEC 1988

The following are uses of radioactive isotops except for

A. Sterilization of medical equipment
B. Tracing reaction paths
C. Dating elements
D. Radiography
E. Determining equilibrum positions

Question 18:

• WAEC 1988

The main characteristic feature of transition metals is that they

A. Have the same atomic size
B. Are reducing agents
C. From ions easily
D. Have variable oxidation states
E. Are highly electropositive

Question 19:

• WAEC 1988

The following are heavy chemicals except

A. Tetraoxosulphate (IV) acid
B. Caustic soda
C. Sodium trioxocarbonate (IV)
D. Ethene
E. Dyes

Question 20:

• WAEC 1988

What quantity of silver is deposited when 96500C of electricity is passed through a solution containing silver ions? (Ag = 108, 1F = 96500C)

A. 1.08g
B. 40g
C. 10,.8g
D. 21.6g
E. 108g