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

In zero order reaction, the rate is independent of :

Question # 2

Which statement is not correct

Question # 3

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

Question # 4

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

Question # 5

If a reactant or product of a reaction absorbs radiation, then physical method for determining the rate of reaction is

Question # 6

A white precipitate ofsilver chlorideimmediately formed on additionof :

Question # 7

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

Question # 8

The unit of rate constant K ismole-1 dm3for a chemical reaction, the order of reaction is :

Question # 9

Rate law of an equation is obtained :

Question # 10

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Question # 11

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Question # 12

With increases of 10°C temperature the rate of reactiondoubles. This increase in rate of reactionis due to :

Question # 13

It rate law of an equation is written asdx/dt=K[A][B] ?

Question # 14

When the rate of reaction is entirely independent of the conc. of reaction molecules then order of reaction is

Question # 15

All reactions occur in :

Question # 16

Factor which slows down the rate of reaction is

Question # 17

The rate of reaction b/w two specific time intervals is called :

Question # 18

Refrectrometric method is used when

Question # 19

In the hydrolysis of CH3COOC2H5the acid produced is

Question # 20

The factor which effect the rate of reaction

Question # 21

Which statement is true about order of reaction :

Question # 22

When copper is allowed to react with HNO3, the reaction is slow in the beginning, finally becomes very fast. It is due to the formation of an auto catalyst which is

Question # 23

The value of activation energy Ea of a reaction can be determined from the value of slope of the straight line obtained by plotting a graph between 1/T and log k. the value of Ea is equal to

Question # 24

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Question # 25

Decreases om concentration of reactant is denoted by

Question # 26

______ are called biocatalysts

Question # 27

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

Question # 28

Half life period of a first order reaction is independent of:

Question # 29

For effective collisions the molecules slow down before collision and their kinetic energy decreases which results in increase in their

Question # 30

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

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Sr.# Question Answer
1 When initial concentration of reactants an order of reaction is given, then its half life period can be calculated by the equation
A. Choice 1
B. Choice 2
C. Choice 3
D. Choice 4
2 With increases of 10°C temperature the rate of reactiondoubles. This increase in rate of reactionis due to :

A. Decrease in activation energy or reaction.
B. Decrease in number of collisions between reactant molecules.
C. Increase in activation energy of reactants.
D. Increase in number of effective collisions
3 Which of the following may affect the rate constant (k) fro a reaction :
A. Change in concentration.
B. Change in pressure.
C. Change in pH.
D. Change in temperature.
4 When the rate of reaction is entirely independent of the conc. of reaction molecules then order of reaction is
A. Zero
B. First
C. Second
D. Third
5 The unit of rate constant k is the same as that of the rate of reaction in
A. First order reaction
B. Second order reaction
C. Third order reaction
D. Zero order reaction
6 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
7

Which technique is used to determine the absorption of radiations?

A.

Dilatometer method

B.

Optical rotation method

C.

Spectrometry

D.

Refractometric method

8 In the manufacture of NH3by Haber's process catalyst used is iron its catalytic efficiency is poisoned by
A. Presence of Al2O3
B. Presence of Cr2O3
C. MnO2
D. CO present with H2gas
9 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
10 The example of a photo chemical reaction is photosynthesis has order of reaction :
A. 1
B. 2
C. 0
D. 3
11 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
12

A pseudo uni-molecular reaction has order of reaction :

A. 3
B. 2
C. 1
D. 0
13 The sum of the exponents of the conc. terms in the rate equation is called
A. Rate of reaction
B. Order of reaction
C. Specific rate constant
D. Average rate
14 Rate law of an equation is obtained :
A. From a balance equation.
B. Can be calculated theoretically as well as determined experimentally.
C. It is only calculated theoretically.
D. Experimentally.
15 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
16 When copper is allowed to react with HNO3, the reaction is slow in the beginning, finally becomes very fast. It is due to the formation of an auto catalyst which is
A. Cu(NO3)2
B. CuO
C. O2
D. HNO2
17

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.
18 The actual number of atoms or molecules taking part in rate determining step is
A. Rate of reaction
B. Velocity of reaction
C. Order of reaction
D. Molecularly
19
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A. 2
B. 3
C. 4
D. 9
20
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A. Diastase
B. Lipase
C. Inverters
D. Zymase
21 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.
22 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
23 If half life period of a reaction is independent of the concentration of the reactants, then the reaction is
A. Zero order
B. First order
C. Second order
D. Order is in fraction
24 The rate of reaction between two specific time intervals is called
A. Instantaneous rate
B. Average rate
C. Specific rate
D. Ordinary rate
25 Half life period of a first order reaction is independent of:
A. Presence of catalyst.
B. Conditions of temperature
C. Initial concentration of the compound
D. All of above
26 Dilatometric method is used for rate determination when
A. Reactions involving change of optical
B. Reactions involving change of optical activity
C. Reactions involving small volume change
D. None of above
27 Complex protein molecules which catalyses the organic reactions in the living cells are called
A. Living organisms
B. Enzymes
C. Viruses
D. Bacteria
28 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
29 The rate of reaction is denoted by
A. dc/dp
B. dc/ac
C. dc/dT
D. dc/dt
30 In the hydrolysis of CH3COOC2H5the acid produced is
A. Inhibitor
B. Catalyst
C. Auto catalyst
D. None of above

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