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JEE Main Chemistry · General Organic Chemistry · Set 20 (Q571-600)

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  1. 571.
    Which of the following reactions will yield 2,2-dibromopropane ?
    1. (1)CH3–CCH + 2HBr →
    2. (2)CH3CH=CHBr + HBr →
    3. (3)CHCH + 2HBr →
    4. (4)CH3–CH=CH2 + HBr →
  2. 572.
    The organic compound 5-allylcyclohex-3-ene-1-ol is reacted with cold, dilute, aqueous solution of . The total number of hydroxyl group(s) present in the product is
    1. (1)1
    2. (2)2
    3. (3)3
    4. (4)5
  3. 573.
    Which of the following is an aromatic compound?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  4. 574.
    Propane molecule on chlorination under photochemical condition gives two di-chloro
    products, " x " and " y ". Amongst " x " and " y ", " x " is an optically active molecule. How many tri-chloro products (consider only structural isomers) will be obtained from " x " when it is further treated with chlorine under the photochemical condition?
    1. (1)2
    2. (2)5
    3. (3)4
    4. (4)3
  5. 575.
    The number of chiral compounds produced upon monochlorination of 2-methylbutane is :
    1. (1)2
    2. (2)4
    3. (3)6
    4. (4)8
  6. 576.
    Which of the following carbocations is most stable
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  7. 577.
    In the presence of light perchlorodiethyl ether is obtained from diethyl ether.
    O O
    The mechanism through which this reaction proceed.
    1. (1)Addition mechanism
    2. (2)Substitution mechanism
    3. (3)Free radical mechanism
    4. (4)Elimination mechanism
  8. 578.
    The optically inactive compound from the following is :
    1. (1)2-chloropentane
    2. (2)2-chloropropanal
    3. (3)2-chloro-2-methylbutane
    4. (4)2-chlorobutane
  9. 579.
    Among the following which one can have a meso form ?
    1. (1)CH3CH(OH)CH(CI)C2H5
    2. (2)CH3CH(OH)CH(OH)CH3
    3. (3)C2H5CH(OH)CH(OH)CH3
    4. (4)HOCH2CH(CI)CH3
  10. 580.
    Which nomenclature is not according to IUPAC system?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  11. 581.
    The number of stereoisomers obtained by bromination of trans-2-butene is :
    1. (1)1
    2. (2)2
    3. (3)3
    4. (4)4
  12. 582.
    on mercuration-demercuration produces the major product.
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  13. 583.
    In qualitative test for identification of presence of phosphorous, the compound is heated with an oxidising agent. Which is further treated with nitric acid and ammonium molybdate respectively. The yellow coloured precipitate obtained is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  14. 584.
    When the hybridization state of carbon atom changes from to and
    finally to , the angle between the hybridized orbitals
    1. (1)decreases gradually
    2. (2)decreases considerably
    3. (3)is not affected
    4. (4)increases progressively.
  15. 585.
    The product of the reaction give below is :
    X
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  16. 586.
    The IUPAC name of the following compound is :
    1. (1)3-ethyl-4-methylhex-4-ene
    2. (2)4,4-diethyl-3-methylbut-2-ene
    3. (3)4-methyl-3-ethylhex-4-ene
    4. (4)4-ethyl-3-methylhex-2-ene
  17. 587.
    Which of the following compounds has wrong IUPAC name:
    1. (1)CH3–CH2–CH2–COO–CH2CH3 → Ethyl butanoate
    2. (2)→ 3-Methylbutanal
    3. (3)→ 2-Methyl-3-butanol
    4. (4)→ 2-Methyl-3-pentanone
  18. 588.
    The number of possible aromatic benzenoid isomers for are
    1. (1)2
    2. (2)3
    3. (3)4
    4. (4)5
  19. 589.
    The most stable carbocation among the following is
    1. (1)C––
    2. (2)––––
    3. (3)––––
    4. (4)––
  20. 590.
    HBr reacts with =CH– under anhydrous conditions at room temperature to give
    1. (1)CHO and Br
    2. (2)CHO and Br
    3. (3)––
    4. (4)C–CHBr–
  21. 591.
    The IUPAC name of the following compound is
    1. (1)5-cyanopentan-2-onc
    2. (2)5-oxohexanenitrile
    3. (3)4-oxopentanenitrile
    4. (4)2-oxopentanenitrile
  22. 592.
    What is the hybridisation state of benzylcarbonium ion
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  23. 593.
    The major product C and D formed in the following reaction respectively are :
    ` C–––OC C + D
    1. (1)C–––I and I–C
    2. (2)C–––OH and I–C
    3. (3)C–––I and HO–C
    4. (4)C–––OH and HO–C
  24. 594.
    Chlorobenzene reacts with trichloroacetaldehyde in the presence of

    The major product formed is :
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  25. 595.
    Which of the products indicates the presence of sulphur atom in an organic compound, in qualitative elemental analysis?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  26. 596.
    A species having carbon with sextet of electrons and can act as electrophile is called
    1. (1)carbon free radical
    2. (2)carbanion
    3. (3)carbocation
    4. (4)pentavalent carbon
  27. 597.
    The total number of chiral compound/s from the following is________.
  28. 598.
    The total number of cyclic structural as well as stereo isomers possible for a compound with the molecular formula is
  29. 599.
    Total number of aromatic compounds among the following compounds is_______
  30. 600.
    Testosterone, which is a steroidal hormone, has the following structure.

    Testosterone The total number of asymmetric carbon atom/s in testosterone is