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701
What is the oxidation number of chromium in K
2
CrO
4
?
A.
+1
B.
+2
C.
+4
D.
+6
View Answer & Discuss (2)
WAEC 2007
702
What product is formed at the cathode during the electrolysis of concentrated sodium chloride solution using carbon electrodes?
A.
Chlorine
B.
Hydrogen
C.
Oxygen
D.
Sodium
View Answer & Discuss (7)
WAEC 2007
703
Which of the following substances is suitable solvent for perfumes?
A.
Benzene
B.
Ethanol
C.
Turpentine
D.
Water
View Answer & Discuss (1)
WAEC 2007
704
The complete hydrogenation of C
6
H
6
in the presence of nicked catalyst at 200
o
C gives
A.
C
6
H
8
B.
C
6
H
10
C.
C
6
H
12
D.
C
6
H
14
View Answer & Discuss (1)
WAEC 2007
705
Which of the following pairs of substances can be distinguished by use of NaHCO
3
solution?
A.
CH
3
CH
2
OH and HCOOCH
3
B.
CH
3
CH
2
OH and CH
3
COOH
C.
CH
3
COOH and HCOOH
D.
CH
3
CH
2
OH and CH
3
OH
View Answer & Discuss (4)
WAEC 2007
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