2014 - JAMB Chemistry Past Questions and Answers - page 5
41
The polymer used in making car rear lights is
A
perspex
B
bakeelite
C
polystyrene
D
polyacrylonitrile
42
CH3COOC2H5(1) + H2O(1) ⇌ CH 3COOH (aq) + C 2H 5OH (aq)
The purpose of H+ in the reaction above is to
The purpose of H+ in the reaction above is to
A
increase the yield of products
B
maintain the solution at a constant PH
C
increase the rate of the hydrolysis
D
decrease the rate of the reverse reaction
43
A hydrocarbon has an empirical formula CH and a vapour density of 39. Determine its molecular formula.
[C = 12, H = 1]
A
C2H6
B
C3H8
C
C3H4
D
C6H6
44
Polystyrene is widely used as packaging materials for fragile objects during transportation because of its
A
ligjtness
B
low density
C
high density
D
high compressibility
45
The process of converting linear alkanes to branched chain and cyclic hydrocarbons by heating in the presence of a catalyst to improve the quality of petrol is referred to as
A
refining
B
craching
C
reforming
D
blending
46
The petroleum fraction that is used in heating furnaces in industries is
A
diesel oil
B
gasoline
C
kerosene
D
lubricating oil
47
A
2-bromo-3-chlorobutanol
B
3-bromo-2-chlorobutanol
C
3-chloro-2-bromobutanol
D
2-chloro-3-bromobutanol
48
A
purify the gas
B
dry the gas
C
liquefty the gas
D
remove odour
49
A
O2
B
SO2
C
HCI.
D
H2
50
A
heat of reaction
B
activation energy
C
free energy
D
entropy of reaction
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