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Introduction to the tetravalency of carbon
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1671
The empirical formula of hydrocarbon containing 0. 12 mole of carbon and 0.36 mole of hydrogen is
A.
CH
2
B.
CH
3
C.
C
2
H
2
D.
C
2
H
4
E.
C
2
H
6
View Answer & Discuss (4)
WAEC 1988
1672
A salt which loses mass when exposed to air is
A.
hygroscopic
B.
deliquescent
C.
efflorescent
D.
fluorescent
E.
effervescent
View Answer & Discuss (4)
WAEC 1988
1673
Detergents are better than soaps for laundry because
A.
detergents are synthetic while soaps are not
B.
detergents are more soluble in water than soaps
C.
scum is precipitated when soaps are used with hard water but not with stergents
D.
soaps from soluble saits with ions causing hardness of water while detergents do not
E.
soaps are in bars while detergents are in powder form
View Answer & Discuss (1)
WAEC 1988
1674
Which of the following is used as an anaesthetic?
A.
CHI
3
B.
CHCI
3
C.
CH
3
OH
D.
C
2
H
5
OH
E.
CHBr
3
View Answer & Discuss (3)
WAEC 1988
1675
Which of the following types of hybridization gives rise to tetrahedral molecules?
A.
sp
B.
sp
2
C.
sp
3
D.
sp
3
d
E.
sp
3
d
2
View Answer & Discuss (7)
WAEC 1988
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