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Online Tests
Chemistry 10th Class English Medium Unit 9 Online Test MCQs With Answers
Question # 1
In the beginning the rate of reverse reaction is
Choose an answer
Negligible
Moderate
Very fast
Slow
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Question # 2
In a Reversible Reaction if Qc = Kc then.
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Reaction is occuring in forward direction
Reaction is occuring in Reverse direction
Equilibrium has been allained
Reaction is not at equilibrium
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Question # 3
Active mass is expressed as:
Choose an answer
{ }
[ ]
( )
l l
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Question # 4
Guldberg and waage put forward law of mass action in:
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1860
1869
1870
1879
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Question # 5
If Qc > Kc the reaction will be in
Choose an answer
Chemical equilibrium
Static equilibrium
Reverse reaction
Forward reaction
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Question # 6
Which types of reaction speed up gradually?
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Irreversible reactions
Reversibel reactions
Forward reactions
Decomposition reactions.
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Question # 7
Which one of the following statements is not correct about active mass?
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Rate of reaction is directly proportional to activ emass.
Active mass is taken in molar concentration
Active mass is represented by square brackets
Active mass means total mass of substances.
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Question # 8
When CaCO
3,
.is heated in an open flask, it decomposes to form calcium oxides and .
Choose an answer
O
2
CO
CO
2
CO
3
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Question # 9
For a reaction between PCL
3
and Cl
2
to form PCl
5
the units of Kc are:
Choose an answer
Mol dm
-3
Mol
-1
dm
-3
Mol
-1
dm
3
Mol dm
3
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Question # 10
The % age of nitrogen and oxygen in our atmosphere is:
Choose an answer
80
90
95
99
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Question # 11
K
c
is always equal to
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Rf/Rr
Kf /Kt
Kf/Kr
Rr/Rt
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Question # 12
If Qc < Kc the reaction goes in:
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Forward
Reverse
At equilibrium state
None
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Question # 13
When the magnitude of Kc is very large in indicates.
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Reaction never go to completion
Reaction is in equilibrium state
Reaction will complete after some time
Reaction has almost to completion
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