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746
In dry Leclanche cell, manganese (IV) oxide acts as
A.
a reducing agent
B.
binding agent
C.
catalyst
D.
depolarizer
View Answer & Discuss (1)
WAEC 2008
747
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
View Answer & Discuss (16)
WAEC 2008
748
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
View Answer & Discuss (4)
WAEC 2008
749
A mixture of kerosene and diesel oil can be separated by
A.
crystallization
B.
distillation
C.
precipitation
D.
sublimation
View Answer & Discuss (2)
WAEC 2008
750
Which of the following compounds would not give a precipitate with ammoniacal AgNO3 solution?
A.
CH
3
C≡CCH
3
B.
HC≡CH
C.
CH
3
C≡CH
D.
CH
3
CH
2
C≡CH
View Answer & Discuss (3)
WAEC 2008
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