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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
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Spectroscopic
Conductiometric
Refractometric
Titration
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Question # 2
Dilatometric method is used for rate determination when
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Reactions involving change of optical
Reactions involving change of optical activity
Reactions involving small volume change
None of above
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Question # 3
If half life period of a reaction is independent of the concentration of the reactants, then the reaction is
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Zero order
First order
Second order
Order is in fraction
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Question # 4
The unit rate of constan K is
mole
-1
dm
3
S
-1
for a chemical reaction, the order of reaction is :
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3
2
1
0
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Question # 5
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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 # 6
If the rate equation of a reaction 2A+B-------->Products is , Rate = K[A] [B], and A is present in large excess, then order of reaction is :
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1
2
3
Above
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Question # 7
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First order
Pseudo first order
Second order
Zero order
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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
The effective activity of a metal catalyst is increased if it is in
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Solid form
Liquid state
Gaseous state
Finely divided form
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Question # 10
The reaction rate is expressed in the units of
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Mol dm
-3
S
-
Mol dm
-3
Mol dm
-3
N
-
dm
-3
S
-
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Question # 11
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 # 12
When we perform the same reaction by taking two different initial concentrations of a reactant for a second order reaction then
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Reaction becomes exothermic
Energy of activation is different
Mechanism of reaction is changed
Half life period is changed
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Question # 13
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Measuring pH
Measuring density
Titration against standard NaOH
Titration against standard KMnO
4
solution
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Question # 14
The rate of reaction b/w two specific time intervals is called :
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Instantaneous rate of reaction.
Average rate of reaction.
Rate of a reaction.
Minimum rate of a reaction.
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Question # 15
Refrectrometric method is used when
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Reactions involving absorption of I.R. or U. V
Reactions involving change of refractive index
Reactions involving ions
Change of optical activity
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Question # 16
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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Question # 17
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 # 18
All reactions occur in :
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A single step.
A series of steps
Two steps.
Both (a) and (b)
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Question # 19
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 # 20
The unit of rate constant k is the same as that of the rate of reaction in
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First order reaction
Second order reaction
Third order reaction
Zero order reaction
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Question # 21
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2
3
4
9
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Question # 22
Homogenous catalysis is that in which catalyst and reactants are in same phase. Which one of the following reaction is a homogenous catalysis
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Question # 23
If a reactant or product of a reaction absorbs radiation, then physical method for determining the rate of reaction is
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Spectrometry
Refractometry
Conductivity measurement
Optical method
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Question # 24
When initial concentration of reactants an order of reaction is given, then its half life period can be calculated by the equation
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Question # 25
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 # 26
Which of the following is not affected by light
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Question # 27
The experimental relationship between a reaction rate and the concentration of reactants is called
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Order or reaction
Rate law
Activated complex
Molecularity
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Question # 28
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Diastase
Lipase
Inverters
Zymase
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Question # 29
Complex protein molecules which catalyses the organic reactions in the living cells are called
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Living organisms
Enzymes
Viruses
Bacteria
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Question # 30
Decreases om concentration of reactant is denoted by
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dc/dt
-dc/dt
+dc/dt
None
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