ECAT Pre Engineering Chemistry Chapter 11 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 11 Reaction Kinetics

Try The MCQ's Test For ECAT Chemistry Chapter 11 Reaction Kinetics

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ECAT Chemistry Chapter 11 Reaction Kinetics

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Question # 1

Dilatometric method is used for rate determination when

Question # 2

When we perform the same reaction by taking two different initial concentrations of a reactant for a second order reaction then

Question # 3

The number of atoms or molecules whose concentrations determine the rate of the reaction is called

Question # 4

which one of the following is a heteroheneous catalysis

Question # 5

Optical rotation method is sued when

Question # 6

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Question # 7

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Question # 8

The rate constant k of a reaction activation energy Ea and temperature are related by Arrhenius in the form of an equation which is

Question # 9

Complex protein molecules which catalyses the organic reactions in the living cells are called

Question # 10

For a chemical reaction to take place the particles must have sufficient energy for the effective collisions, the energy is called

Question # 11

The sum of the exponents of the conc. terms in the rate equation is called

Question # 12

Which of the following is not affected by light

Question # 13

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 :

Question # 14

The reaction rate is expressed in the units of

Question # 15

The effective activity of a metal catalyst is increased if it is in

Question # 16

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Question # 17

Half life period of N2O5is 24 minutes and it remains same where we increase or decrease its initial concentration, then reactions

Question # 18

In exothermic reaction decrease in potential energy of the products will result in

Question # 19

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Question # 20

In the expression rate = K [A]a[B]bK is

Question # 21

By the use of catalysis the energy of activation is

Question # 22

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Question # 23

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Question # 24

The rate of reaction determined at a given time is called

Question # 25

The actual number of atoms or molecules taking part in rate determining step is

Question # 26

Group l-A elements react with water fastly than the reaction of group ll-A elements because

Question # 27

The rate of reaction :

Question # 28

It is common observation that rates of chemical reactions differ :

Question # 29

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Question # 30

The unit of rate constant is the same as that of the rate of reaction in :

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Sr.# Question Answer
1 Which statement is not correct
A. Enzymes catalyst a specific reaction
B. Enzymes show catalytic activity at a specific temperature
C. The catalytic activity of enzymes is stopped if optimum pH is changed
D. The catalytic activity is poisoned by a co-enzymes
2 The addition of a catalyst to a reaction changes the
A. Enthalpy
B. Entropy
C. Nature of reactants
D. Energy of activation
3

A white precipitate ofsilver chlorideimmediately formed on additionof :

A. Silver nitrate solution to sodium chloride solution.
B. Silver chloride solution to sodium nitrate solution.
C. Silver nitrate solution to potassium chloride solution
D. Silver nitrate solution to hydrogen chloride solution.
4 The rate of reaction between two specific time intervals is called
A. Instantaneous rate
B. Average rate
C. Specific rate
D. Ordinary rate
5 A substance which increases the rate of a reaction without being consumed during the reaction is called
A. An autocatalyst
B. A catalyst
C. A negative catalyst
D. All of these
6
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A. Homogeneous
B. Heterogeneous
C. Isogeneous
D. None
7 Which of the following reactions occur at moderate rate :
A. Rusting of iron
B. Chemical weathering of stone work of buildings by acidic gases in atmosphere.
C. Hydrolysis of an ester
D. Fermentation of sugars
8 The unit of rate constant is the same as that of the rate of reaction in :
A. First order reaction.
B. Second order reaction.
C. Zero order reaction.
D. Third order reaction.
9 The effective activity of a metal catalyst is increased if it is in
A. Solid form
B. Liquid state
C. Gaseous state
D. Finely divided form
10
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A. Diastase
B. Lipase
C. Inverters
D. Zymase
11 Complex protein molecules which catalyses the organic reactions in the living cells are called
A. Living organisms
B. Enzymes
C. Viruses
D. Bacteria
12 The unit rate of constan K ismole-1 dm3S-1for a chemical reaction, the order of reaction is :
A. 3
B. 2
C. 1
D. 0
13 Which statement about Arrhenius equation is incorrect
A. Factor 'A' called Arrhenius constant depends upon collision frequency of reactants
B. Rate of reaction increase by increasing temperature
C. Rate constant k is increased
D. Activation energy Ea is decreased by rise in temperature
14 If the rate of reaction is independent of the concentration of the reactant, the reaction is of
A. Zero order
B. First order
C. Second order
D. Third order
15 It is common observation that rates of chemical reactions differ :
A. Greatly.
B. A little bit.
C. Moderately.
16 Which statement is true about order of reaction :
A. Order of reaction can only be determined by an experiment.
B. Order of reaction can be determined from a balance equation only.
C. Order of reaction increase by increasing temperature.
D. Order of reaction must be in whole number and not in fraction.
17 The unit of the rate constant is the same as that of rate of reaction in :
A. Third order reaction
B. Second order reaction
C. First order reaction
D. Zero order reaction
18 Which of the following will affect the rate :
A. First step of reaction.
B. Last step of reaction.
C. Rate determining step.
D. Fastest step.
19

Which technique is used to determine the absorption of radiations?

A.

Dilatometer method

B.

Optical rotation method

C.

Spectrometry

D.

Refractometric method

20 Hydrogenation of vegetable oils is accelerated by Ni catalyst. The catalytic activity of Bi is increased by a promoter of activator which is
A. Na and K
B. Na and Hg
C. Hg and Zn
D. Cu and Te
21 Half life period of a reaction is inversely proportion to the initial concentration of the reactant, then order of reaction is
A. Third order
B. Second order
C. Fist order
D. Zero order
22 The factor which effect the rate of reaction
A. Nature of reactants
B. Surface area
C. Light
D. All of the above
23 The unit of rate constant K ismole-1 dm3for a chemical reaction, the order of reaction is :
A. Order of reaction can determined by an experiment
B. Order of reaction can determined from a balance equation only.
C. Order of reaction can determined increases by increasing temperate.
D. Order of reaction must be in whole number and not in fraction.
24 Which one of the following reaction rate is effected by the light
A. Choice 1
B. Choice 2
C. Choice 3
D. Choice 4
25 Factor which slows down the rate of reaction is
A. Small size of the particles of the reactant
B. High temperature of reaction
C. More concentration of reactant
D. Lowering the temperature
26 In the rate equation when the concentration of reactants are unity, then rate is equal to
A. Instantaneous rate
B. Average rate
C. Active mass of products
D. Specific rate constant
27 The rate determining step is the :
A. Slowest step.
B. Fastest step.
C. Moderate step.
D. Both (a) and (b).
28 Dilatometer method is useful for the reaction that involve :
A. Small volume changes in solutions
B. Change in infractive indices
C. Where reactants absorb U.V, visible or infrared radiation
29 In the expression rate = K [A]a[B]bK is
A. The order of reaction
B. The speed of reaction
C. The specific rate constant
D. The overall order of reaction
30 The rate of reaction b/w two specific time intervals is called :
A. Instantaneous rate of reaction.
B. Average rate of reaction.
C. Rate of a reaction.
D. Minimum rate of a reaction.

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