Chemistry 2012 | Study Mode

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Question 11
A
Alpha-particles
B
Beta-particles
C
Gamma-rays
D
X-rays
Explanation

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Correct option: D
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Question 12
A
I and ll only
B
ll and lll only
C
l and lll only
D
l,lll and lll
Explanation

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Correct option: A
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Question 13
A
insoluble sodium compounds which from soluble solutions of calcium and magesium
B
solube soudium compounds which from soluble solutions of calcium and magnesium ions
C
solube sodium compounds which from insoluble precipitates of calcium and magnesium ions
D
insoluble precipitates of calcium and magnesium ions
Explanation

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Correct option: C
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Question 14
A
make the water colourless
B
remove germs from the water
C
make the water tastedful
D
remove odour from the water
Explanation

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Correct option: B
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Question 15
A
plotting their solubility curves on separete axes
B
plotting their solubility curves on the same axes
C
plotting some of the solubility curves on the x-axis and others on the y-axis
D
plotting their solubility curves on the x-axis only
Explanation

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Correct option: B
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Question 16
A
1.00g
B
10.00g
C
12.25g
D
122.50g
Explanation

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Correct option: D
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Question 17
A
Carbon (ll) oxide
B
Radioactive fallout
C
Biodegradable waste
D
Sulphus (lV) oxide
Explanation

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Correct option: B
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Question 18
A
HNO 3 +NaOH
B
H 2SO 4 + KOH
C
HC +Mg (OH) 2
D
HNO 3 + KOH
Explanation

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Correct option: C
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Question 19
A
basicity
B
acid strength
C
pH
D
concentration
Explanation

The basicity of an acid is the number of replaceable Hydrogen ions, \(H^+\), or Hydroxonium ion, \(H_{3}O^{+}\) in one molecule of the acid.


Correct option: A
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Question 20
A
22.40 dm 3
B
11.20 dm 3
C
2.24 dm 3
D
1.12 dm 3
Explanation

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Correct option: D

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