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Online Tests
Chemistry 10th Class English Medium Unit 9 Online Test MCQs With Answers
Question # 1
Such reactions which continue in both directions are called.
Choose an answer
Irreversible
Reversible
Nonreactive
Dynamic
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Question # 2
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 # 3
Formation profess of Ammonia by the combination Hydrogen and Nitrogen was given by:
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Dalton
Thomson
Haber
Waage
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Question # 4
The reaction in which the number of moles reactants and products not equal in balance chemical equation the units of Kc for this reactions are
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mol
-2
dm
3
mol
2
mol dm
-1
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Question # 5
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 # 6
The reaction will attain the equilibrium if:
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Qc<Kc
Qc > Kc
Qc = Kc
Qc = 0
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Question # 7
When the magnitude of Kc is very small in indicates.
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Equilibrium will never establish
All reactants will converted to products.
Reaction will go to completion
The amount of products is negligible
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Question # 8
If Qc > Kc the reaction will be in
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Chemical equilibrium
Static equilibrium
Reverse reaction
Forward reaction
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Question # 9
Equilibrium constant value "K" is equal to:
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Kt / Kr
Ki / Kr
Kc / Qc
Qc /Kc
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Question # 10
The substance formed during the chemical reaction are called.
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Products
Reactants
Radical
Element
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Question # 11
Which colour of HI is ?
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Orange
Purple
Red
Colourless
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Question # 12
Which type of reactions do not go to completion?
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Irreversible reaction
Reversible reactions
Addition reactions
Decomposition reactions
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Question # 13
When the rate of a the forward reaction takes place at the rate of reverse reaction the composition of the reaction mixture remains constant it is called.
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Chemical equilibrium
Dynamic equilibrium
Static equilibrium
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