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Online Tests
Chemistry 10th Class English Medium Unit 9 Online Test MCQs With Answers
Question # 1
The reaction in which the products can recombine to form reactants are called.
Choose an answer
Reversible reaction
Irreversible reaction
Decomposition
Addition
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Question # 2
The characteristics of reversible reactions are the following except:
Choose an answer
Products never recombine to form reactants.
They never complete
The proced in both ways
They have a double arrow between reactants and products.
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Question # 3
Such reactions which continue in both directions are called.
Choose an answer
Irreversible
Reversible
Nonreactive
Dynamic
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Question # 4
The value of equilibrium constant (Kc) depends only on:
Choose an answer
temperature
Pressure
concentration
density
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Question # 5
K
c
is always equal to
Choose an answer
Rf/Rr
Kf /Kt
Kf/Kr
Rr/Rt
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Question # 6
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 # 7
A complete reaction is one is which.
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All the reactants convert into products.
All the reactants do not convert into products.
Half reactants convert into products.
Only 10% reactants convert into products.
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Question # 8
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 # 9
The reaction goes from left to right , if:
Choose an answer
Qc = Kc
Qc > kc
Qc<Kc
Qc = 0
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Question # 10
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 # 11
Dynamic means, reaction is:
Choose an answer
In forward direction
Stop
In reverse direction
Still continuing.
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Question # 12
Equilibrium constant value "K" is equal to:
Choose an answer
Kt / Kr
Ki / Kr
Kc / Qc
Qc /Kc
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Question # 13
In chemical reaction , the substances that combine are called.
Choose an answer
Reactants
Products
Equlibrium
Numerator
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