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Online Tests
Chemistry 10th Class English Medium Unit 9 Online Test MCQs With Answers
Question # 1
The lives of aquatic plants and animals are indirectly related to concentration of dissolved ------ in water:
Choose an answer
hydrogen
oxygen
chlorine
nitrogen
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Question # 2
The unit of molar concentration is:
Choose an answer
moldm
-3
moldm
+3
molcm
-3
molcm
+3
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Question # 3
when a system is in equilibrium state or in dynamic equilibrium state.
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Reactants and product are equal
Forward reactions stops
Reverse reactions stops
Forward reaction rate and reverse reaction rate
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Question # 4
In chemical reaction , the substances that combine are called.
Choose an answer
Reactants
Products
Equlibrium
Numerator
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Question # 5
When the magnitude of Kc is very large in indicates.
Choose an answer
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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Question # 6
The reaction in which the products do not recombine to form reactants are called.
Choose an answer
Inversible reactions
Reversible reaction
Decomposition
Addition
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Question # 7
For reactions having large Kc value, the reaction proceeds to:
Choose an answer
Completion
Equilibrium state
back ward
None of these
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Question # 8
Which one of the following statements is not correct about active mass?
Choose an answer
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 # 9
If Qc < Kc the reaction goes in:
Choose an answer
Forward
Reverse
At equilibrium state
None
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Question # 10
At dynamic equilibrium state:
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Rate of forward reaction≠Rate of reverse reaction
Rate of forward reaction > Rate of reverse reaction
Rate of forward reaction = Rate of reverse reaction
Rate of forward reaction < rate of reverse reaction
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Question # 11
In a Reversible Reaction if Qc = Kc then.
Choose an answer
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 # 12
When the number of moles of both sides are equal in a reaction then the unit of Kc will be:
Choose an answer
no unit
mol-2 dm6
mol dm3
mo-2 dn
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Question # 13
Equilibrium constant value "K" is equal to:
Choose an answer
Kt / Kr
Ki / Kr
Kc / Qc
Qc /Kc
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