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Online Tests
ECAT Chemistry Chapter 8 Chemical Equilibrium Online Test MCQs With Answers
Question # 1
For which system does the equilibrium constant, KC has units of concentration
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Question # 2
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Pressure change
Temperature change
Concentration change
Catalyst
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Question # 3
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Forward
Backward
Already in equilibrium
K
c
is never less
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Question # 4
In a lime kiln, to get higher yield of CO
2
, the measure that can be taken is
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To main high temperature
To pump out CO
2
To remove Cao
To add more CaCO
3
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Question # 5
Which one of the following has no units of its K
c
value
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Question # 6
If the difference of pKa values of the two acids is 2, then
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Acid with smaller pKa is 10 times stronger acid
Acid with greater pKa is 10 times stronger acid
Acid with smaller pKa is 100 times stronger acid
Acid with greater pKa is 100 times stronger acid
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Question # 7
For what value of
K
c almost forward reaction is complete :
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K
c =
10
30
K
c =
10
-30
K
c =
0
K
c =
1
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Question # 8
Ammonium carbonate when heated to 200
°C gives a mixture of NH
3
and CO
2
vapour with a density of 13.0. What is the degree of dissociation of ammonia carbonate?
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3/2
1/2
2
1
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Question # 9
K
sp
value for PbSO
4
= 1.8 x 10
-8
mole
2
dm
-6
. The maximum concentration of Pb
++
ions is
Choose an answer
1.34 x 10
-4
mole dm
-3
1.8 x 10
-4
3.6 x 10
-16
mole dm
-3
1.0 x 10
-8
mole dm
-3
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Question # 10
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0.12
0.50
0.25
4.00
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