Waec Chemistry 1991 Past Questions and Answers

Question 11:

• WAEC 1991

Which of the following formula is that of a dicarboxylic acid?

A. (CH₃CH ₂)₂CHCOOH
B. CH₂(OH)₂
C. CH₃CH(OH)COOH
D. CH₂(COOH)₂
E. CH₃COCOOH

Question 12:

• WAEC 1991

The products of the electrolysis of dilute sodium chlorid solution with platinum electrodes are

A. Hydrogen and oxygen
B. Oxygen and chlorine
C. Chlorine and water
D. Sodium amalgam and chlorine
E. Sodium hydroxide and water

Question 13:

• WAEC 1991

Which of the following modes of motion is exhibited by the particles of a solid?

A. Vibrational and random motion
B. Vibrational and translational motion
C. Translational and random motion
D. Vibrational motion only
E. Translational motion only

Question 14:

• WAEC 1991

Which of the following statements is not correct? Group 7 elements

A. Are diatomic
B. Are good oxidizing agents
C. Are highly electronegative
D. Have relatively low ionization potentials
E. Have high electron affinity

Question 15:

• WAEC 1991

In which of the following are the substances arranged in their correct order of increasing melting point?

A. Sodium chloride, sulphur, diamond
B. Diamond, sodium chloride, sulphur
C. Sulphur, sodium chloride, diamond
D. Diamond, sulphur, sodium chloride
E. Sulphur, diamond, sodium chloride