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396
Which of the following compounds has the highest ionic character?
A.
PCI
5
B.
SiCI
4
C.
AICI
3
D.
KCI
View Answer & Discuss (5)
WAEC 1999
397
If an element with high electron affinity combines with another element with low ionization energy the bond formed will be mainly
A.
covalent
B.
ionic
C.
dative
D.
metallic
View Answer & Discuss (1)
WAEC 1999
398
One mole of a compound M(HCO
3
)
2
has a mass of 162g. Calculate the relative atomic mass of M. [H = 1, C =12, O = 16]
A.
122
B.
101
C.
53
D.
40
View Answer & Discuss
WAEC 1999
399
Exhaust fumes discharged from a smoky vehicle gradually become invisible as a result of
A.
diffusion
B.
combustion
C.
absorption
D.
emission
View Answer & Discuss
WAEC 1999
400
Which of the following movements can be described as random motion?
A.
wheelbarrow being pushed
B.
car travelling on a straight line
C.
Gas molecules colliding in a flask
D.
Planets going round the sun
View Answer & Discuss
WAEC 1999
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