KVPY Sample Paper KVPY Stream-SX Model Paper-3

  • question_answer
    What is correct for stability order- of isomers
    (I) Cyclohexan 1, 3 diol aa > ee conformer conformer
    (II) Cylco octene cis > trans isomer Isomers
    (III) 1, 2 dimethyl cyclobutane trans > cis isomer Isomer
    (IV) Ethan-1, 2 diol anti form > gauch form
    (V) Methyl cyclohexan Axial conformer > equatorial conformer

    A) I, III, IV, V only

    B) I, II, III only

    C) I, III, IV only

    D) All are correct

    Correct Answer: B

    Solution :

    [B]
    \[\to \](I) is correct due to H bonding
    \[\to \](II) In cycloalkene cis isomer is stable upto 8-10 membering.
    \[\to \](III) trans more stable than cis.
    \[\to \](IV) Due to H bond Gauche more stable
    \[\to \](V) Generally equatorial conformer more stable than axial conformer.


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