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JEE Main 20248 AprilEvening Shift
Exam
JEE Main
Year
2024
Date
8 April
Shift
Evening Shift
Subject
Chemistry
Chapter
General Organic Chemistry

JEE Main 2024 · 8 April · Evening Shift · Chemistry · General Organic Chemistry

The correct sequence of acidic strength of the following aliphatic...

The correct sequence of acidic strength of the following aliphatic acids in their decreasing order is: (\mathrm{CH}}_{3} \mathrm{CH}}_{2} \mathrm{COOH}, \mathrm{CH}}_{3} \mathrm{COOH}, \mathrm{CH}}_{3} \mathrm{CH}}_{2} \mathrm{CH}}_{2} COOH,HCOOH\mathrm{COOH}, \mathrm{HCOOH})

Options

  1. A(\mathrm{CH}}_{3} \mathrm{CH}}_{2} \mathrm{CH}}_{2} \mathrm{COOH} \gt \mathrm{CH}}_{3} \mathrm{CH}}_{2} \mathrm{COOH} \gt \mathrm{CH}}_{3} COOH>HCOOH\mathrm{COOH} \gt \mathrm{HCOOH})
  2. B(\mathrm{CH}}_{3} \mathrm{COOH} \gt \mathrm{CH}}_{3} \mathrm{CH}}_{2} \mathrm{COOH} \gt \mathrm{CH}}_{3} \mathrm{CH}}_{2} \mathrm{CH}}_{2} COOH>HCOOH\mathrm{COOH} \gt \mathrm{HCOOH})
  3. C(\mathrm{HCOOH} \gt \mathrm{CH}}_{3} \mathrm{COOH} \gt \mathrm{CH}}_{3} \mathrm{CH}}_{2} \mathrm{COOH} \gt \mathrm{CH}}_{3} \mathrm{CH}}_{2} \mathrm{CH}}_{2} COOH\mathrm{COOH})
  4. D(\mathrm{HCOOH} \gt \mathrm{CH}}_{3} \mathrm{CH}}_{2} \mathrm{CH}}_{2} \mathrm{COOH} \gt \mathrm{CH}}_{3} \mathrm{CH}}_{2} \mathrm{COOH} \gt \mathrm{CH}}_{3} COOH\mathrm{COOH})

Correct answer

C. (\mathrm{HCOOH} \gt \mathrm{CH}}_{3} \mathrm{COOH} \gt \mathrm{CH}}_{3} \mathrm{CH}}_{2} \mathrm{COOH} \gt \mathrm{CH}}_{3} \mathrm{CH}}_{2} \mathrm{CH}}_{2} COOH\mathrm{COOH})

Step-by-step solution

CH3CH2COOH,CH3COOH,CH3CH2CH2COOH\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH}, \mathrm{CH}_3 \mathrm{COOH}, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{COOH}, HCOOH\mathrm{HCOOH} The correct order is : HCOOH>CH3COOH>CH3CH2COOH>CH3CH2CH2COOH\begin{aligned} & \mathrm{HCOOH}>\mathrm{CH}_3 \mathrm{COOH}>\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH}> \\ & \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{COOH}\end{aligned}
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