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    Subject
    Chemistry

    Class

    JEE Class 12

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    JEE Chemistry Solved Question Paper 2009

    Multiple Choice QuestionsMultiple Choice Questions

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    71.

    Which of the following compounds would be the main product of an aldol condensation of acetaldehyde and acetone ?

    • CH3CH=CHCHO

    • CH3CH=CHCOCH3

    • (CH3)2C= CHCHO

    • (CH3)2C= CHCOCH3

    B.

    CH3CH=CHCOCH3

    When aldehydes condense with ketones, it is the α-hydrogen atom of the ketone which involved in the aldol condensation.

    CH3CHO + HCH2COCH3 →NaOH CH3CH(OH)CH2COCH3major + CH3CH(OH)CH2CHO                                                             +(CH3)2C(OH)CH2COCH3 + (CH3)2C(OH)-CH2CHOCH3CH(OH)CH2COCH3major →-H2O∆ CH3CH=CHCOCH3Major product(25%)

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    72.

    Which one of the following compounds will not react with CH3MgBr ?

    • Ethyl acetate

    • Acetone

    • Dimethyl ether 

    • Ethanol

    Answer
    73.

    Dehydration of alcohol usually goes by

    • E1 mechanism

    • E2 mechanism

    • E1 cb mechanism

    • SN2 mechanism

    Answer
    74.

    Which one of the following is a copolymer?

    • Saran

    • Orlon

    • PVC

    • Teflon

    Answer
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    75.

    Which one of the following compounds will not undergo aldol condensation ?

    • Acetaldehyde

    • Formaldehyde

    • Propionaldehyde

    • Acetone

    Answer
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    NCERT Solutions
    Textbook Solutions | Additional Questions

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