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Chemistry 10th Class English Medium Unit 9 Online Test MCQs With Answers
Question # 1
The major components of Atmosphere are:
Choose an answer
Carbon and Nitrogen
Nitrogen and Oxygen
Oxygen and Chlorine
None of these
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Question # 2
Guldberg and waage out forward law of mass action in:
Choose an answer
1889
1879
1869
1859
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Question # 3
In the beginning the rate of reverse reaction is
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Negligible
Moderate
Very fast
Slow
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Question # 4
In irreversible reaction, dynamic equilibrium:
Choose an answer
Never establishes
Establishes before the completion of reaction
Establishes after the completion of reaction
Establishes readily
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Question # 5
Which chemical is called king of chemicals?
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KNO
3
H
2
SO
4
HCl
NHO
3
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Question # 6
When the magnitude of Kc is very small it indicates.
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Equilibrium will never establish
All reactants will be converted to products.
Reaction will go to completion
The amount of products is negligible
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Question # 7
At dynamic equilibrium:
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The reactions stops to proceed
The amounts of reactants and products are equal
The speed of the forward is reverse reactions are equal
The reaction can no longer be reversed
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Question # 8
When the magnitude of Kc is very large it indicates.
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Reaction mixture consist of almost all products.
Reaction mixture consist of almost all reactants.
Reaction has not gone to completion
Reaction mixture has negligible products.
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Question # 9
When a system is at equilibrium states?
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The concentration of reactants and products becomes equal
The opposing reactions
The rate of the reverse reaction becomes very low
The rates of the forward and reverse reactions becomes equal.
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Question # 10
When the reaction causes to produced it is called.
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Chemical equlibrium state
Static equilibrium
Dynamic equilibriiun
All
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Question # 11
The substance formed during the chemical reaction are called.
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Products
Reactants
Radical
Element
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Question # 12
If Qc = Kc the reaction goes in:
Choose an answer
Forward
Reverse
At equilibrium state
None
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Question # 13
Which types of reaction speed up gradually?
Choose an answer
Irreversible reactions
Reversibel reactions
Forward reactions
Decomposition reactions.
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