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Haloalkanes and...

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  • Question 1
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    Which of the SN2 reaction is fastest?

     

  • Question 2
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    Which statement is true about SN2 mechanism?

     

  • Question 3
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    A correct statement about transition state of SN2 reaction is 

  • Question 4
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    What is the correct increasing order of reactivity of the  followings in SN2 reaction ?

    I. CH2 = CHCH2 — Br
    II. CH2 = CH— I
    III. CH3CH2CH2 — I
    IV. CH3OCH2CH2 — I 

  • Question 5
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    What is the correct increasing order of reactivity of the following in the SN2 reaction?

  • Question 6
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    Consider the two lines shown in the diagram given below.

    Q. 

    In a SN2 reaction, these two lines compare the effect of the

  • Question 7
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    Consider the two lines shown in the diagram given below.

    Q. 

    Which of the following apply appropriately to a SN2 reaction?

  • Question 8
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    The correct statement concerning a SN2 reaction is

  • Question 9
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    The chloro compound which can be used as fire extinguisher is:

     

  • Question 10
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    Exposure to lower levels of a compound in air can lead to slightly impaired hearing and vision. Identify the compound.

     

  • Question 11
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    The antiseptic properties of iodoform is due to which of the following:

     

  • Question 12
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    Central nervous system can be depressed by the use of which of the following:

  • Question 13
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    Depletion of Ozone is believed to increase:

     

  • Question 14
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    Which is the correct formula of Freon-12?

  • Question 15
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    Comprehension Type

    Direction (Q. Nos. 15-17) This section contains a paragraph, describing theory, experiments, data, etc. Three Questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).

    Passage

    The general mechanism of a SN2 reaction is as follows.

    Factors that limit the rate of reaction are steric hindrance at α-cabron of substrate and strength of C—X bond. Any factor which stabilises transition state increases the rate of reaction.

    Q. 

    Consider the following SN2 reaction,

    Which of the following energy diagram is correctly labelled?

  • Question 16
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    Passage

    The general mechanism of a SN2 reaction is as follows.

    Factors that limit the rate of reaction are steric hindrance at α-cabron of substrate and strength of C—X bond. Any factor which stabilises transition state increases the rate of reaction.

    Q. 

    In the previous question, under identical reaction condition, i.e. tem perature, concentration of substrate and nucleophile, the correct relationship between rate constant is

  • Question 17
    4 / -1

    Passage

    The general mechanism of a SN2 reaction is as follows.

    Factors that limit the rate of reaction are steric hindrance at α-cabron of substrate and strength of C—X bond. Any factor which stabilises transition state increases the rate of reaction.

    Q. 

    Which of the following is not a correct representation of SN2 reaction ?

  • Question 18
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    Direction (Q. Nos. 18-20) This section contains 3 questions. When worked out will result in an integer from 0 to 9 (both inclusive).

    Consider the following reaction,

    Q.

    The above reaction was started taking equal concentrations of ethyl iodide and NaOH. After 1.0 h, concentration of iodoethane is dropped to (1/3)rd of initial value. By what factor, the rate of reaction would have been decreased by the same time?

     

  • Question 19
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    Under identical experimental condition, how many of the following substrate react at faster rate with aqueous NaOH than 2-bromobutane as substrate?


     

  • Question 20
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    Consider the following compound,

    Q. 

    If the above compound is treated with excess of NaCN(aq), how many CN- group would be incorporated by SN2 reaction?

     

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