Waec Chemistry 2002 Past Questions and Answers

Question 6:

• WAEC 2002

If two metallic ions of the same concentration migrate to a graphite cathode, the one that would be preferentially discharged is the one that has the

A. Smaller mass
B. Lower electrical charge
C. Greater stability in solution
D. Stronger tendency to accept electrons

Question 7:

• WAEC 2002

When concentrated sodium chloride solution is electrolysed using inert electrodes the products are

A. Oxygen and hydrogen
B. Hydrogen and oxygen
C. Sodium and oxygen
D. Soduim and chlorine

Question 8:

• WAEC 2002

Which of the following processes takes place during the production of margarine from vegetable oils?

A. Esterification
B. Hydrolysis
C. Hydrogenation
D. Saponification

Question 9:

• WAEC 2002

Which of the following compounds can be represented by the molecular formula C₂H₆O?

A. Propanel
B. Ethanol
C. Methanoic acid
D. Glucose

Question 10:

• WAEC 2002

When alkynes are hydrogenated completely, they produce compounds with the general molecular formula

A. C _nH _n
B. C _nH _2n+2
C. C_nH _2n
D. C_nH_2n-2