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Set 16 of 25 · Questions 451-480 of 724

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JEE Main Chemistry · General Organic Chemistry · Set 16 (Q451-480)

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  1. 451.
    During dehydration of alcohols to alkenes by heating with concentrated H2SO4 the initation step is
    1. (1)Protonation of alcohol molecule
    2. (2)Formation of carbocation
    3. (3)Elimination of water
    4. (4)Formation of an ester
  2. 452.
    IUPAC name of
    1. (1)3-chlorobutane
    2. (2)2-chloro-2-methylpropane
    3. (3)-butyl chloride
    4. (4)-butyl chloride.
  3. 453.
    Amongst the given options, the compound(s) in which all the atoms are in one plane in all the possible conformations (if any), is (are)
    1. (1)
    2. (2)H–C≡
    3. (3)C=C=O
    4. (4)C=C=
  4. 454.
    The correct combination of names for isomeric alcohols with molecular formula O is/are
    1. (1)tert-butanol and 2-methylpropan-2-ol
    2. (2)tert-butanol and 1, 1-dimethylethan-1-ol
    3. (3)n-butanol and butan-1-ol
    4. (4)isobutyl alcohol and 2-methylpropan-1-ol
  5. 455.
    The number of chiral centres in penicillin is
    1. (1)3.00 to 3.00
    2. (2)2.00 to 2.00
    3. (3)1.00 to 1.00
    4. (4)None of these
  6. 456.
    The most stable carbocation from the following is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  7. 457.
    Common name of Benzene - 1, 2 - diol is -
    1. (1)catechol
    2. (2)o-cresol
    3. (3)quinol
    4. (4)resorcinol
  8. 458.
    The purification method based on the following physical transformation is:
    1. (1)Distillation
    2. (2)Extraction
    3. (3)Sublimation
    4. (4)Crystallization
  9. 459.
    What is IUPAC name of following compound?
    1. (1)1-Methoxy-3,3-dimethylcyclobutane
    2. (2)3-Methoxy-1,1-dimethylcyclobutane
    3. (3)3,3-Dimethylcyclobutoxymethane
    4. (4)1-Methoxy-3-isoproylbutane
  10. 460.
    Number of and bonds present in ethylene molecule is respectively:
    1. (1)4 and 1
    2. (2)5 and 2
    3. (3)3 and 1
    4. (4)5 and 1
  11. 461.
    The IUPAC name of the following compound
    is
    1. (1)trans-2-chloro-3-iodo-2-pentene
    2. (2)cis-3-iodo-4-chloro-3-pentene
    3. (3)trans-3-iodo-4-chloro-3-pentene
    4. (4)cis-2-chloro-3-iodo-2-pentene
  12. 462.
    The number of optically active products obtained from the complete ozonolysis of the given compound is:
    1. (1)0
    2. (2)1
    3. (3)2
    4. (4)4
  13. 463.
    The major product obtained in the following reaction is:
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  14. 464.
    Consider the following reaction
    Propanal + Methanal =
    The correct statement for product B is. It is
    1. (1)optically active and adds one mole of bromine
    2. (2)racemic mixture and is neutral
    3. (3)racemic mixture and gives a gas with saturated solution
    4. (4)optically active alcohol and is neutrall
  15. 465.
    The treatment of CH3MgX with CH3C≡C–H produces
    1. (1)CH3C≡C–CH3
    2. (2)
    3. (3)
    4. (4)–CH=
  16. 466.
    Total number of stereo isomers possible for the given structure :
    1. (1)2
    2. (2)4
    3. (3)3
    4. (4)8
  17. 467.
    Which among the following is the strongest acid ?
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  18. 468.
    What is the correct order of acidity of the protons marked A-D in the given
    compounds ?
    1. (1)>>>
    2. (2) > > >
    3. (3) > > >
    4. (4)>>>
  19. 469.
    How many chain isomers could be obtained from the alkane ?
    1. (1)Four
    2. (2)Five
    3. (3)Six
    4. (4)Seven
  20. 470.
    2-Methylbutane on reacting with bromine in the presence of sunlight gives mainly?
    1. (1)1-Bromo-3-methylbutane
    2. (2)1-Bromo-2-methylbutane
    3. (3)2-Bromo-3-methylbutane
    4. (4)2-Bromo-2-methylbutane
  21. 471.
    What is the IUPAC name of the following compound?
    1. (1)2-Bromo-3- methylpent-3-ene
    2. (2)3-Bromo-1, 2-dimethylbut-1-ene
    3. (3)4-Bromo-3- methylpent-2-ene
    4. (4)3-bromo-3-methyl-1, 2-dimethyprop-1-ene
  22. 472.
    The increasing order of basicity for the following intermediates is (from weak to strong)
    1. (1)
    2. (2)
    3. (3)
    4. (4)
  23. 473.
    The pair of electron in the given carbanion, CH3C , is present in which of the following orbitals?
    1. (1)sp
    2. (2)2p
    3. (3)sp3
    4. (4)sp2
  24. 474.
    Which of the following molecules does not show stereoisomerism ?
    1. (1)3,4 -Dimethylhex-3-ene
    2. (2)3-Methylhex-1-ene
    3. (3)3-Ethylhex-3-ene
    4. (4)4-Methylhex-1-ene
  25. 475.
    The IUPAC name of the following compound is
    1. (1)3-(2-Butyl) Pentane
    2. (2)2-(3-Pentyl) butane
    3. (3)3-Ethyl-4- methylhexane
    4. (4)Methyl-4-ethylhexane
  26. 476.
    The incorrect statement regarding the geometrical isomers of 2-butene is :
    1. (1)cis-2-butene and trans-2-butene are not interconvertible at room temperature.
    2. (2)cis-2-butene and trans-2-butene are stereoisomers.
    3. (3)cis-2-butene has less dipole moment than trans-2-butene.
    4. (4)trans-2-butene is more stable than cis-2-butene.
  27. 477.
    The dihedral angle in staggered form of Newman projection of 1,1,1-Trichloro ethane is ........ degree. (Round off to the nearest integer) (Round off to the nearest integer)
  28. 478.
    The possible number of stereoisomers for 5-phenylpent-4-en-2-ol is ……….
  29. 479.
    The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are):
  30. 480.
    The number of different chain isomers for is