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191
Which of the following indicates the correct increasing order of oxidizing power of the halogens?
A.
F < CI < Br < l
B.
l < Br < CI < F
C.
I < CI < Br < F
D.
Br < I < CI < F
E.
CI < F < I < Br
View Answer & Discuss (1)
WAEC 1993
192
Which of the following substances is a peroxide?
A.
Na
2
O
2
B.
CuO
C.
Pb
O
4
D.
Fe
2
O
E.
AI
2
O
View Answer & Discuss (1)
WAEC 1993
193
The component of air that removed when air is bubbled into alkaline pyrogallol solution is
A.
carbon(lV) oxide
B.
oxgyen
C.
water vapour
D.
nitrogen
E.
helium
View Answer & Discuss
WAEC 1993
194
Which of the following will not affect the degree of hardness in a sample of temporarily hard water?
A.
Addition of washing soda
B.
Adding of soap
C.
Treatment with carbon exchange resin
D.
Filtration
E.
Distillation
View Answer & Discuss
WAEC 1993
195
Examples of polymers include the following except
A.
starch
B.
nylon
C.
wool
D.
perspex
E.
glass
View Answer & Discuss
WAEC 1993
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