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Chemical Kineti...

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  • Question 1
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    Direction (Q. Nos. 1-14) This section contains 14 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.

    A chemical reaction proceeds through the following steps :

    Step I, 2A ⇌ X  fast
    Step II, X+B ⇌ Y slow
    Step III, Y+B ⇌ Product fast

    Q. The rate law for the overall reaction is

  • Question 2
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    The following reaction obey rate law 

    It can follow mechanism

    I. NO2 + O3  NO3 + O2 ,   

    NO3+NO2  N2O5

    II.  NO2 + O  NO3

    NO3+NO2  N2O5

    Select the correct mechanism.

  • Question 3
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    A chemical reaction is said to take place through the various stages with ΔG° values indicated by the graph:

    Stages I and II represent respectively

  • Question 4
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    Following reaction takes place by mechanism:

    Step I

    Step II

    Hence  for the given reaction is 

  • Question 5
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    For the reaction, 

    Steps are 



  • Question 6
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    For the reaction,

    A + 2B → C+ D

    The rate law is k [A] [B] .
    Select the correct statement.

     

  • Question 7
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    For the reaction, 

    Mechanism is given by

    Rate law is true, if 

  • Question 8
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    For the following SN reaction, 

    Rate-determining step is

  • Question 9
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    Reaction between nitric oxide and hydrogen takes place by the following mechanism:



    Q.

    Rate of the overall reaction in terms of the concentration of the reactants is 

  • Question 10
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    Consider the following reaction,

    The rate equation for this reaction is, rate = k[CI2] [H2S]
    Which of these mechanisms is/are consistent with this rate equation?


    [AIEEE2010]

  • Question 11
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    The following mechanism has been proposed for the reaction,

    It involves the following steps:

    Q.

    The order of the reaction w.r.t. NO(g) is

  • Question 12
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    Consider the three following proposed mechanism for the overall equation.




     

    Q.

    Which mechanism predicts a third order reaction? 

  • Question 13
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    Consider the following proposed mechanism :

  • Question 14
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    Based on the following steps:

    Rate law is 

  • Question 15
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    Direction (Q. Nos. 15- 20) This section contains 3 paragraphs, each describing theory, experiments, data, etc., Six questions related to the paragraphs have been given. Each question has ONLY ONE correct answer among the four given options (a), (b), (c) and (d).

    Passage I

    The ozone in the earth’s ozone layer decomposes according to the equation,

    It involves

    (Time is in seconds and concentration in mol L-1)

    Q. 

    Rate of disappearance of O3 is

  • Question 16
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    Passage I

    The ozone in the earth’s ozone layer decomposes according to the equation,

    It involves

    (Time is in seconds and concentration in mol L-1)

    Q.

    What is the rate at a time of 50% decomposition of O3, when [O3]0 = 1.0 M?

  • Question 17
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    Passage II

    N2O5 decomposes according to the following equation:

    The following mechanism has been given:


    Q.

    Rate of formation of O2 is given by

  • Question 18
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    Passage II

    N2O5 decomposes according to the following equation:

    The following mechanism has been given:


    Q.

    Half-life period is independent of the concentration of N2O5. Thus,

  • Question 19
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    Passage III

    is believed to proceed through the following three step mechanism:


    Q.

    Identify the false statement.

  • Question 20
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    Passage III

    is believed to proceed through the following three step mechanism:


    Q.

    What is the rate equation of the reaction?

  • Question 21
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    Direction (Q. Nos. 21 and 22) This section contains 2 questions. When worked out will result in one integer from 0 to 9 (both inclusive).

    Consider the following proposed mechanism:

     (rate constant =k ) to describe the overall equations

    Q.

    What is the order predicted by the proposed mechanism?

     

  • Question 22
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    For the overall reaction between A and 6 to yield C and D, two mechanisms are proposed.

    Q.

    At what concentration of A and/or B will the inherent rates be equal?

     

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