Waec Chemistry 2008 Past Questions and Answers

Question 31:

• WAEC 2008

In dry Leclanche cell, manganese (IV) oxide acts as

A. A reducing agent
B. Binding agent
C. Catalyst
D. Depolarizer

Question 32:

• WAEC 2008

Oxidation takes place at the anode during electrolysis because the anode

A. Is deficient in electrons
B. Is deficient in protons
C. Has excess electrons
D. Has attraction for positive ions

Question 33:

• WAEC 2008

Calculate the quantity of electricity passed when 0.4 A flows for 1 hour 20 minutes through an electrolytic cell

A. 4800C
B. 3840 C
C. 1920 C
D. 32 C

Question 34:

• WAEC 2008

A mixture of kerosene and diesel oil can be separated by

A. Crystallization
B. Distillation
C. Precipitation
D. Sublimation

Question 35:

• WAEC 2008

Which of the following compounds would not give a precipitate with ammoniacal AgNO₃ solution?

A. CH₃ C≡CCH₃
B. HC≡CH
C. CH₃C≡CH
D. CH₃CH₂C≡CH