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

Platinum is poisoned by

Question # 2

Which statement is true about order of reaction :

Question # 3

Which one of the following reaction rate is effected by the light

Question # 4

Rate law of an equation is obtained :

Question # 5

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Question # 6

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Question # 7

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

Question # 8

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

Question # 9

Optical rotation method is sued when

Question # 10

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 # 11

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

Question # 12

A zero order reaction is one in which :

Question # 13

In zero order reaction, the rate is independent of :

Question # 14

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Question # 15

In the rate equation when the concentration of reactants are unity, then rate is equal to

Question # 16

To determine the rate of reaction chemically a graphical method is applied. A graph is plotted between the amount or reactant decomposed or product formed against the time. The rate dx/dtat any time is equal to

Question # 17

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Question # 18

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Question # 19

If half life period of a reaction is independent of the concentration of the reactants, then the reaction is

Question # 20

The rate determining step is the :

Question # 21

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Question # 22

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Question # 23

The catalytic activity of Pt is much higher when

Question # 24

The reaction rate is expressed in the units of

Question # 25

Factor which slows down the rate of reaction is

Question # 26

The experimental relationship between a reaction rate and the concentration of reactants is called

Question # 27

Decreases om concentration of reactant is denoted by

Question # 28

Refrectrometric method is used when

Question # 29

Half life period of a reaction is inversely proportion to the initial concentration of the reactant, then order of reaction is

Question # 30

The factor which effect the rate of reaction

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Sr.# Question Answer
1 Complex protein molecules which catalyses the organic reactions in the living cells are called
A. Living organisms
B. Enzymes
C. Viruses
D. Bacteria
2 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 :
A. 1
B. 2
C. 3
D. Above
3
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A. Three times
B. Six times
C. Nine times
D. Two times
4 If initial concentration of the reactants and half life period of the reaction is known, then we can determine
A. Average rate of reaction
B. Order of reaction
C. Rate constant k
D. Instantaneous rate
5 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
6 In the reaction of oxalic acid with KMnO4and H2SO4is slow at the beginning but after sometimes the reaction becomes faster due to
A. Formation of MnSO4which acts as 'Auto catalyst
B. Formation of CO2which acts as 'Auto catalyst
C. Formation of K2SO4which acts as 'Auto catalyst
D. Evolution of O2gas which acts as 'Auto catalyst
7
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A. Measuring pH
B. Measuring density
C. Titration against standard NaOH
D. Titration against standard KMnO4solution
8

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.
9 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
10
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A. 1st order
B. 2nd order
C. Zero order
D. 3rd order
11 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.
12 The rate of reaction determined at a given time is called
A. Average rate
B. Instantaneous rate
C. Specific rate
D. Overall rate
13 Rate of chemical reaction depends upon :
A. The number of total collisions per second.
B. Number of molecules taking part in a chemical reaction.
C. Number of fruitful collisions per second
D. Number of fruitless collisions per second.
14 The factor which effect the rate of reaction
A. Nature of reactants
B. Surface area
C. Light
D. All of the above
15 For effective collisions the molecules slow down before collision and their kinetic energy decreases which results in increase in their
A. Activation energy
B. Average energy
C. Potential energy
D. Collisions frequency
16 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.
17 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
18 The rate of reaction determined at a given time is called
A. Average rate
B. Instantaneous rate
C. Specific rate
D. Overall rate
19 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.
20 When we perform the same reaction by taking two different initial concentrations of a reactant for a second order reaction then
A. Reaction becomes exothermic
B. Energy of activation is different
C. Mechanism of reaction is changed
D. Half life period is changed
21 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
22 Activation energy is the difference of energy between the energy of the reactant and
A. The product
B. The activated complex
C. Both a and b
D. None of these
23

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.
24 Group l-A elements react with water fastly than the reaction of group ll-A elements because
A. lAelements are more soft then llA
B. lAelements are non-metals
C. lAelements have 1 electron in their outermost s-orbital and are strongly electropositive
D. lAelements make ionic bond
25 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
26 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
27 If a reactant or product of a reaction absorbs radiation, then physical method for determining the rate of reaction is
A. Spectrometry
B. Refractometry
C. Conductivity measurement
D. Optical method
28

A pseudo uni-molecular reaction has order of reaction :

A. 3
B. 2
C. 1
D. 0
29 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
30
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A. First order
B. Pseudo first order
C. Second order
D. Zero order

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