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JEE Main 202225 JuneEvening Shift
Exam
JEE Main
Year
2022
Date
25 June
Shift
Evening Shift
Subject
Chemistry
Chapter
Aldehydes and Ketones

JEE Main 2022 · 25 June · Evening Shift · Chemistry · Aldehydes and Ketones

Which of the following conditions or reaction sequence will NOT...

Which of the following conditions or reaction sequence will NOT give acetophenone as the major product?Which of the following conditions or reaction sequence will NOT give acetophenone as the major product?Which of the following conditions or reaction sequence will NOT give acetophenone as the major product?Which of the following conditions or reaction sequence will NOT give acetophenone as the major product?Which of the following conditions or reaction sequence will NOT give acetophenone as the major product?

Options

  1. A

    (a)

    Two discs of same mass and different radii are made of different materials such that their thicknesses are 1cm and 0 .

    (b) Na2Cr2O7,H+{Na}_{2}{Cr}_{2}{O}_{7}, {H}^{+}

  2. B

    (a)

    Two discs of same mass and different radii are made of different materials such that their thicknesses are 1cm and 0 .

    (b) PCC,DCMPCC, DCM

  3. CTwo discs of same mass and different radii are made of different materials such that their thicknesses are 1cm and 0 .
  4. DTwo discs of same mass and different radii are made of different materials such that their thicknesses are 1cm and 0 .

Correct answer

C. Two discs of same mass and different radii are made of different materials such that their thicknesses are 1cm and 0 .

Step-by-step solution

Ethyl benzoate on reaction with 2 moles of grignard reagent forms a tertiary alcohol.Hence acetophenone cannot be formed in this reaction as shown below.

Ph−COO−C2H5+CH3MgBr⟶PhCOCH3⟶CH3MgBrPhC(CH3)2OHPh - COO - {C}_{2}{H}_{5} + {CH}_{3}MgBr ⟶ {PhCOCH}_{3}\overset{{CH}_{3}MgBr}{⟶}PhC{\left({CH}_{3}\right)}_{2}OH

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