The ascending acidity order of the following H atoms is begin aligned A: & ce HC C-H oplus \ 2pt] B: & ce H2C=CH- oplus H \ 2pt] C: & ce H3C- overset H3C underset H3C C oplus -H \ 2pt] D: & ce H3C-CH2- oplus H end aligned

Chemistry · General Organic Chemistry

JEE Main 2024 — 29 January, Shift 2 — Question 59

The ascending acidity order of the following H atoms is $\begin{aligned} \text{A: }& $\ce{HC#C-H^{\oplus}}$ \\[2pt] \text{B: }& $\ce{H2C=CH-^{\oplus}H}$ \\[2pt] \text{C: }& $\ce{H3C- \overset{H3C}{\underset{H3C}{C^{\oplus}}} -H}$ \\[2pt] \text{D: }& $\ce{H3C-CH2-^{\oplus}H}$ \end{aligned}$

Option A:
C $<$ D $<$ B $<$ A
Correct
Option B:
A $<$ B $<$ C $<$ D
Option C:
A $<$ B $<$ D $<$ C
Option D:
$\mathrm{D}<\mathrm{C}<\mathrm{B}<\mathrm{A}$

Answer: A

Step-by-step solution

Stability of conjugate base $\alpha$ acidic strength $\mathrm{C}<\mathrm{D}<\mathrm{B}<\mathrm{A}$

Answer key and solution verified before publishing.

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Exam: JEE Main 2024
Paper: 29 January, Shift 2
Subject: Chemistry
Chapter: General Organic Chemistry
Topic: Other applications of electronic effects