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Online Tests
ECAT Chemistry Chapter 11 Reaction Kinetics Online Test MCQs With Answers
Question # 1
The chemical method used for determination of rate of reaction is
Choose an answer
Spectroscopic
Conductiometric
Refractometric
Titration
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Question # 2
The rate determining step is the :
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Slowest step.
Fastest step.
Moderate step.
Both (a) and (b).
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Question # 3
The rate of reaction determined at a given time is called
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Average rate
Instantaneous rate
Specific rate
Overall rate
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Question # 4
The unit of the rate constant is the same as that of rate of reaction in :
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Third order reaction
Second order reaction
First order reaction
Zero order reaction
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Question # 5
A zero order reaction is one in which :
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Rate is not affected by changing concentration of reactants.
concentration of reactants do not change with the passage of time.
Reactants do not react.
One reactants in large excess.
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Question # 6
The rate of reaction is denoted by
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dc/dp
dc/ac
dc/dT
dc/dt
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Question # 7
The unit of rate of reaction is
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mole dm
-3
mole Kg
-1
moles dm
-3
sec
-1
grams dm
-3
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Question # 8
With the progressive of the reaction the slope of the curve between concentration of product and time
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Gradually becomes more steep
Gradually becomes less steep
No change occurs in slope
None of these occurs
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Question # 9
In the reaction of oxalic acid with KMnO
4
and H
2
SO
4
is slow at the beginning but after sometimes the reaction becomes faster due to
Choose an answer
Formation of MnSO
4
which acts as 'Auto catalyst
Formation of CO
2
which acts as 'Auto catalyst
Formation of K
2
SO
4
which acts as 'Auto catalyst
Evolution of O
2
gas which acts as 'Auto catalyst
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Question # 10
Which of the following factors does not influenced the rate of reaction
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Concentration of the reaction
Nature of the reactants
Molecularity of the reaction
Temperature
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Question # 11
Which one of the following reaction rate is effected by the light
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Question # 12
The unit of rate constant is the same as that of the rate of reaction in :
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First order reaction.
Second order reaction.
Zero order reaction.
Third order reaction.
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Question # 13
The addition of a catalyst to a reaction changes the
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Enthalpy
Entropy
Nature of reactants
Energy of activation
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Question # 14
Choose an answer
1st order
2nd order
Zero order
3rd order
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Question # 15
With increases of 10
°C temperature the rate of reactiondoubles. This increase in rate
of reaction
is due to :
Choose an answer
Decrease in activation energy or reaction.
Decrease in number of collisions between reactant molecules.
Increase in activation energy of reactants.
Increase in number of effective collisions
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Question # 16
In exothermic reaction decrease in potential energy of the products will result in
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Decreases in kinetic energy of the particles
Increases in kinetic energy of the particles
No change in kinetic energy
Decreases in activation energy
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Question # 17
Half life period of a reaction is inversely proportion to the initial concentration of the reactant, then order of reaction is
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Third order
Second order
Fist order
Zero order
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Question # 18
Group l-A elements react with water fastly than the reaction of group ll-A elements because
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l
A
elements are more soft then ll
A
l
A
elements are non-metals
l
A
elements have 1 electron in their outermost s-orbital and are strongly electropositive
l
A
elements make ionic bond
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Question # 19
The rate of reaction :
Choose an answer
Increase as the reaction proceeds.
Decreases as the reaction proceeds.
Remains the same as the reaction proceed.
May decrease or increase as the reaction proceeds.
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Question # 20
If the rate of reaction is independent of the concentration of the reactant, the reaction is of
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Zero order
First order
Second order
Third order
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Question # 21
______ are called biocatalysts
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Organic acids
Organic bases
Enzymes
All
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Question # 22
In the hydrolysis of CH
3
COOC
2
H
5
the acid produced is
Choose an answer
Inhibitor
Catalyst
Auto catalyst
None of above
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Question # 23
The catalytic activity of Pt is much higher when
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It is mixed with asbestos
It is mixed with Pd
It is mixed with arsenic
In is made colloidal platinum
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