2006 - JAMB Chemistry Past Questions and Answers - page 2
11
The sulphide which is insoluble in dilute hydrochloric acid is
A
FeS
B
CuS
C
ZnS
D
Na2S
correct option: b
Users' Answers & Comments12
Which of the following typically represents a photochemical reaction?
A
Formation of water from hydrogen and oxygen molecules
B
Conversion of dinitrogen (IV) oxide to nitrogen (IV) oxide
C
Decomposition of calcium hydroxide to its oxide
D
Conversion of silver halides to grey metallic silver
correct option: d
Users' Answers & Comments13
The gas obtained as a product of anaerobic action on organic matter buried in the earth is
A
ethene
B
methane
C
carbon (IV) oxide
D
nitrogen (IV) oxide
correct option: c
Users' Answers & Comments14
Nigerian crude oil is described as light crude because of its
A
low sulphur content
B
high natural gas content
C
high octane number
D
low aliphatic-hydrocarbon content
correct option: a
Users' Answers & Comments15
An example of aliphatic unsaturated hydrocarbon is
A
pentane
B
butanol
C
propene
D
benzene
correct option: c
Users' Answers & Comments16
Which of the following has an isomer?
A
C6H6
B
C2H6
C
C4H10
D
C2H4
correct option: c
Users' Answers & Comments17
CH3 - CH2 - C CH
The hybridization in the compound above is
The hybridization in the compound above is
A
Sp2
B
sp
C
sp3 and sp2
D
sp3 and sp
correct option: d
Users' Answers & Comments18
One mole of a hydrocarbon contains 36g of carbon and its vapour density is 20. The structure of the hydrocarbon is
A
CH3C ≡ CH
B
CH3CH = CH2
C
CH3CH2C ≡ CH
D
CH3CH2 CH3
correct option: a
2VD = Rmm VD = Vapour density; Rmm - Relative
2 * 20 = 40 Molecular mass
Mole of carbon = 36/12 = 3
Mole of H2 = 40 - 36 = 4
The compound contains 3 mole of carbon and 4 hydrogen
Users' Answers & Comments2 * 20 = 40 Molecular mass
Mole of carbon = 36/12 = 3
Mole of H2 = 40 - 36 = 4
The compound contains 3 mole of carbon and 4 hydrogen
19
An emulsion may be produced by shaking a detergent solution with
A
palm wine
B
ethanoic acid
C
palm oil
D
water
correct option: c
Users' Answers & Comments20
The products of the combustion of candle wax are
A
hydrogen and water
B
oxygen and water
C
carbon (IV) oxide and water
D
carbon (II) oxide and water
correct option: c
Users' Answers & Comments