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Set 21 of 25 · Questions 601-630 of 724

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JEE Main Chemistry · General Organic Chemistry · Set 21 (Q601-630)

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  1. 601.
    Given

    Which of the given compounds can exhibit tautomerism ?
    1. (1)I and II
    2. (2)II and III
    3. (3)I, II and III
    4. (4)I and III
  2. 602.
    In a nucleophilic substitution reaction :
    R–Br + R–Cl +
    Which one of the following undergoes complete inversion of configuration ?
    1. (1)Br
    2. (2)Br
    3. (3)Br
    4. (4)Br
  3. 603.
    Which one of the following does not have hybridized carbon?
    1. (1)acetone
    2. (2)acetic acid
    3. (3)acetonitrile
    4. (4)acetamide
  4. 604.
    Elimination of HBr from 2-bromobutane result in the formation of :
    1. (1)Predominantly 2-butyne
    2. (2)Predominantly 1-butene
    3. (3)Predominantly 2-butene
    4. (4)Equimolar mixture of 1 and 2-butene
  5. 605.
    The correct statement(s) about the compound given below is (are).
    1. (1)The compound is optically active
    2. (2)The compound possesses centre of symmetry
    3. (3)The compound possesses plane of symmetry
    4. (4)The compound possesses axis of symmetry
  6. 606.
    In allene (), the type(s) of hybridisation of the carbon atoms is (are) :
    1. (1)sp and
    2. (2)sp and
    3. (3)only
    4. (4) and
  7. 607.
    A solution of ( – ) – 1 – chloro–1–phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5, due to the formation of :
    1. (1)carbanion
    2. (2)carbene
    3. (3)carbocation
    4. (4)free radical
  8. 608.
    All structures given below are of vitamin C. Most stable of them is : OH
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  9. 609.
    Treatment of cyclopentanone methyl lithium gives which of the
    following species?
    1. (1)Cyclopentanonyl radical
    2. (2)Cyclopentanonyl biradical
    3. (3)Cyclopentanonyl anion
    4. (4)Cyclopentanonyl cation
  10. 610.
    In the Newman projection for 2, 2-Dimethylbutane

    X and Y can respectively be :
    1. (1)H and H
    2. (2)H and
    3. (3) and H
    4. (4) and
  11. 611.
    The main product of the following reaction is :
    C6H5CH2CH(OH)CH(CH3)2
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  12. 612.
    The enolic form of ethyl acetoacetate as shown below has
    1. (1)9 sigma bonds and 2 pi‐bonds
    2. (2)9 sigma bonds and 1 pi‐bond
    3. (3)18 sigma bonds and 2 pi‐bonds
    4. (4)16 sigma bonds and 1 pi‐bond.
  13. 613.
    According to IUPAC system, the compound
    is named as
    1. (1)Cyclohex-1-en-2-ol
    2. (2)1-Hydroxyhex-2-ene
    3. (3)Cyclohex-1-en-3-ol
    4. (4)Cyclohex-2-en-1-ol
  14. 614.
    The IUPAC name(s) of the following compound is (are)
    1. (1)4-methylchlorobenzene
    2. (2)1-chlorotoluene
    3. (3)1-chloro-4-methylbenzene
    4. (4)1-methyl-4-chlorobenzene
  15. 615.
    Which one of the following compounds is not aromatic ?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  16. 616.
    C8H16 that can form cis-trans geometrical isomers and also has a chiral centre, is
    1. (1)
    2. (2)
    3. (3)Both of these
    4. (4)None of these
  17. 617.
    IUPAC name of following compound is:
    1. (1)1-Ethyl-5, 5-dimethylcyclohexane
    2. (2)3-Ethyl-1,1-dimethylcyclohexane
    3. (3)1-Ethyl-3, 3-dimethylcyclohexane
    4. (4)1,1-Dimethyl-3-ethylcyclohexane
  18. 618.
    The correct order of basicity for the following molecules is:
    1. (1)R P Q
    2. (2)P Q R
    3. (3)
    4. (4)Q P R
  19. 619.
    The isomeric deuterated bromide with molecular formula DBr having two chiral carbon atoms is
    1. (1)2-Bromo-1 -dcuterobutane
    2. (2)2-Bromo-2-deuterobutane
    3. (3)2-Bromo-3-deuterobutane
    4. (4)2-Bromo-1 -deutero-2-methylpropane
  20. 620.
    The number of stereoisomers possible for 1,2 dimethyl cyclopropane is:
    1. (1)One
    2. (2)Four
    3. (3)Two
    4. (4)Three
  21. 621.
    On treatment of the following compound with a strong acid, the most susceptible site for bond cleavage is :
    1. (1) –
    2. (2) –
    3. (3) –
    4. (4) –
  22. 622.
    Identify structure of 2,3-dibromo-1-phenylpentane.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  23. 623.
    2‐Methyl‐2‐butene will be represented as
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  24. 624.
    A solution of (–)-1-chloro-1-phenylethane in toluene racemises slowly in the presence of a small amount of , due to the formation of :
    1. (1)carbanion
    2. (2)carbine
    3. (3)carbocation
    4. (4)free radical
  25. 625.
    IUPAC name of following hydrocarbon is :
    1. (1)2-Ethyl-3,6-dimethylheptane
    2. (2)2,5,6-Trimethyloctane
    3. (3)3,4,7-Trimethyloctane
    4. (4)2-Ethyl-2,6-diethylheptane
  26. 626.
    Point out incorrect sawhorse drawing(s) for the following compound.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  27. 627.
    The increasing order of the acidity of the following carboxylic acids is :
    1. (1)I < III < II < IV
    2. (2)IV < II < III < I
    3. (3)II < IV < III < I
    4. (4)III < II < IV < I
  28. 628.
    Functional group present in sulphonic acids is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  29. 629.
    For the given compound X, the total number of optically active stereoisomers is …….
  30. 630.
    Number of electrophilic centre in the given compound is____