1992 - JAMB Chemistry Past Questions and Answers - page 2
11
The pollutants that are likely to be present in an industrial environment are?
A
H2S,SO2 and oxides of nitrogen
B
NH3, HCI and CO
C
CO2, NH3 and H2S
D
dust, NO and CI2
correct option: a
Users' Answers & Comments12
Four elements P,Q,R and S have 1,2,3, and 7 electrons in their outermost shells respectively. The element which is unlikely to be a metal is?
A
P
B
Q
C
R
D
S
correct option: d
Users' Answers & Comments13
Which of the following gases dissolves in water vapour to produce acid rain during rainfall?
A
Oxygen
B
Carbon (II) oxide
C
Nitrogen
D
Sulphur (IV) oxide
correct option: d
Users' Answers & Comments14
Water for town supply is chlorinated to make it free from?
A
bad odour
B
bacteria
C
temporary hardness
D
permanent hardness
correct option: b
Users' Answers & Comments15
On which of the following is the solubility of a gaseous substance dependent? I. Nature of solvent II. Nature of solute III. Temperature IV. Pressure
A
I, II, III and IV
B
I and II only
C
II only
D
I, III and IV only
correct option: d
Users' Answers & Comments16
An emulsion paint consists of ?
A
gas or liquid particles dispersed in liguid
B
liquid particles dispersed in liquid
C
solid particles dispersed in liquid
D
solid particles dispersed in solid
correct option: b
Users' Answers & Comments17
A sample of orange juice is found to have a pH of 3.80. What is he concentration of the hydroxide ion in the juice?
A
1.6 x 10-4
B
6.3 x 10-11
C
6.3 x 10-4
D
1.6 x 10-11
correct option: b
Users' Answers & Comments18
Arrange HCI, CH3COOH, C6H5CH3 in order of increasing conductivity.
A
HCI, CH3COOH, C6H5CH3
B
C6H5CH3, HCI, CH3COOH
C
C6H5CH3, CH3COOH, HCI
D
CH3COOH, C6H5CH3, HCI
correct option: c
Users' Answers & Comments19
How many grams of H2SO4 are necessary for the preparation of 0.175 dm3 of M 6.00 M H2SO4?
(S = 32.06, O = 16.00 H = 1.00)
(S = 32.06, O = 16.00 H = 1.00)
A
206.0 g
B
103.0 g
C
98.1 g
D
51.5 g
correct option: b
1 mole of H2SO4 ≈ 98 gms
0.175 dm3 of 6.0 m H2SO4
1000 cm3 ≈ dm3
(0.175) / (1000) of 6.0 m H2SO4
0.000175 x 6 x 98 ≈ 0.1029 gms
1 dm3 - 1000 cm3
∴ 0.1029 x 1000 = 103 gms
Users' Answers & Comments0.175 dm3 of 6.0 m H2SO4
1000 cm3 ≈ dm3
(0.175) / (1000) of 6.0 m H2SO4
0.000175 x 6 x 98 ≈ 0.1029 gms
1 dm3 - 1000 cm3
∴ 0.1029 x 1000 = 103 gms
20
Copper (II) tetraoxosulphate (VI) solution is electrolyzed using carbon electrodes. Which of the following are produced at the anode and cathode respectively ?
A
Copper and oxygen
B
Oxygen and copper
C
Hydrogen and copper
D
Copper and hydrogen
correct option: b
Users' Answers & Comments