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JEE Main 202127 AugustEvening Shift
Exam
JEE Main
Year
2021
Date
27 August
Shift
Evening Shift
Subject
Chemistry
Chapter
Carboxylic Acid Derivatives

JEE Main 2021 · 27 August · Evening Shift · Chemistry · Carboxylic Acid Derivatives

Which one of the following reactions will not yield propanoic acid?

Which one of the following reactions will not yield propanoic acid?

Options

  1. ACH3CH2CH2Br+Mg,CO2{CH}_{3}{CH}_{2}{CH}_{2}Br + Mg, {CO}_{2} dry ether /H3O+/ {H}_{3}{O}^{+}
  2. BCH3CH2CH3+KMnO4(Heat),OH−/H3O+{CH}_{3}{CH}_{2}{CH}_{3} + {KMnO}_{4} ( Heat ) , {OH}^{-} / {H}_{3}{O}^{+}
  3. CCH3CH2CCl3+OH−/H3O+{CH}_{3}{CH}_{2}{CCl}_{3} + {OH}^{-} / {H}_{3}{O}^{+}
  4. DCH3CH2COCH3+OI−/H3O+{CH}_{3}{CH}_{2}{COCH}_{3} + {OI}^{-} / {H}_{3}{O}^{+}

Correct answer

A. CH3CH2CH2Br+Mg,CO2{CH}_{3}{CH}_{2}{CH}_{2}Br + Mg, {CO}_{2} dry ether /H3O+/ {H}_{3}{O}^{+}

Step-by-step solution

CH3CH2CH2Br⟶MgCH3CH2CH2MgBr⟶CO2/H3O+CH3CH2CH2COOHButanoicacid{CH}_{3}{CH}_{2}{CH}_{2}Br\overset{Mg}{⟶}{CH}_{3}{CH}_{2}{CH}_{2}MgBr\overset{{CO}_{2} / {H}_{3}{O}^{+}}{⟶}\mathop{{CH}_{3}{CH}_{2}{CH}_{2}COOH}_{Butanoicacid}
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