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646
Ethyne undergoes the following reactions except
A.
polymerisation
B.
addition
C.
substitution
D.
esterification
View Answer & Discuss (4)
WAEC 2005
647
Hardness in water can be removed by adding
A.
copper (ll) tetraoxosulphate (IV)
B.
sodium trioxocarbonate (IV)
C.
sodium chloride
D.
alum
View Answer & Discuss (1)
WAEC 2005
648
Which of the following pairs of solutions will produce a precipitate when mixed?
A.
Pb(NO
3
)
2(aq)
and NaCI
(aq)
B.
MgSO
4(aq)
and HCI
(aq)
C.
ZnCI
2(aq)
and NaSO
4(aq)
D.
NaOH
(aq)
and HNO
3(aq)
View Answer & Discuss (1)
WAEC 2005
649
Which of the following substance is an alloy of lead?
A.
Brass
B.
Duralumin
C.
Stainless steel
D.
Soft solder
View Answer & Discuss (1)
WAEC 2005
650
In which of the following processes is biotechnology not applied?
A.
Manufacture of drugs
B.
Treatment of domestic sewage
C.
Production of alcoholic beverages
D.
Electroplating of metals
View Answer & Discuss (1)
WAEC 2005
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