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ECAT Chemistry Chapter 11 Reaction Kinetics Online Test MCQs With Answers
Question # 1
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Small change in concentration of product
Small time internal
Co-efficient of the reactant
Co-efficient of the product
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Question # 2
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 # 3
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Measuring pH
Measuring density
Titration against standard NaOH
Titration against standard KMnO
4
solution
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Question # 4
Which statement about Arrhenius equation is incorrect
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Factor 'A' called Arrhenius constant depends upon collision frequency of reactants
Rate of reaction increase by increasing temperature
Rate constant k is increased
Activation energy Ea is decreased by rise in temperature
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Question # 5
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Zero
253 sec
150 sec
500 sec
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Question # 6
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 # 7
The rate of reaction between two specific time intervals is called
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Instantaneous rate
Average rate
Specific rate
Ordinary rate
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Question # 8
Optical rotation method is sued when
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Reaction involve ions
Change of refractive indices
Reactions involving change of optical activity
None of the above
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Question # 9
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 # 10
The rate of reaction is denoted by
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dc/dp
dc/ac
dc/dT
dc/dt
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Question # 11
Factor which slows down the rate of reaction is
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Small size of the particles of the reactant
High temperature of reaction
More concentration of reactant
Lowering the temperature
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Question # 12
The unit of rate constant K is
mole
-1
dm
3
for a chemical reaction, the order of reaction is :
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Order of reaction can determined by an experiment
Order of reaction can determined from a balance equation only.
Order of reaction can determined increases by increasing temperate.
Order of reaction must be in whole number and not in fraction.
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Question # 13
In the hydrolysis of CH
3
COOC
2
H
5
the acid produced is
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Inhibitor
Catalyst
Auto catalyst
None of above
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Question # 14
The experimental relationship between a reaction rate and the concentration of reactants is known as
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Order
Molecularity
Rate constant
Rate law
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Question # 15
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 # 16
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 # 17
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Rate is independent of concentration of water since it is in excess
Rate is independent of concentration of ester since it is in exces
Rate depends upon the concentration of acid catalyst added
Rate = k[CH
3
COOC
2
H
5
]
1/2
[H
2
O]
1/2
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Question # 18
By the use of catalysis the energy of activation is
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Decreased
Increased
Not affected
None
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Question # 19
The change in concentration of reactant or product per unit time is called :
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Rate constant.
Rate of reaction.
Rate equation.
Rate law.
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Question # 20
Activation energy is the difference of energy between the energy of the reactant and
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The product
The activated complex
Both a and b
None of these
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Question # 21
The number of atoms or molecules whose concentrations determine the rate of the reaction is called
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Molecularity
Order
Rate of reaction
Rate constant
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Question # 22
Which of the following reactions occur at moderate rate :
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Rusting of iron
Chemical weathering of stone work of buildings by acidic gases in atmosphere.
Hydrolysis of an ester
Fermentation of sugars
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Question # 23
The factor which effect the rate of reaction
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Nature of reactants
Surface area
Light
All of the above
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