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Online Tests
Chemistry 10th Class English Medium Unit 9 Online Test MCQs With Answers
Question # 1
If Qc = Kc the reaction goes in:
Choose an answer
Forward
Reverse
At equilibrium state
None
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Question # 2
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 # 3
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 # 4
The % age of nitrogen and oxygen in our atmosphere is:
Choose an answer
80
90
95
99
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Question # 5
when a system is in equilibrium state or in dynamic equilibrium state.
Choose an answer
Reactants and product are equal
Forward reactions stops
Reverse reactions stops
Forward reaction rate and reverse reaction rate
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Question # 6
We exhale gas in the atmosphere during respiration.
Choose an answer
Carbon dioxide
Oxygen
Nitrogen
Water
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Question # 7
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 # 8
For which reaction Kf is the rate constant?
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Forward reaction
Backward reaction
Upward reaction
Downward reaction
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Question # 9
The characteristics of reversible reactions are the following except:
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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 # 10
Which gas is used to manufacture king of chemicals sulphuric acid?
Choose an answer
N
2
O
2
Cl
2
S
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Question # 11
The reaction in which the products do not recombine to form reactants are called.
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Inversible reactions
Reversible reaction
Decomposition
Addition
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Question # 12
Equilibrium constant has no unit when number of moles of reactants and products are:
Choose an answer
same
Different
Both a and b
None of these
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Question # 13
In chemical reaction , the substances that combine are called.
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Reactants
Products
Equlibrium
Numerator
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