JEE Main 2023ChemistryAlcohols Phenols and EthersHardMCQ

JEE Main 2023 — Alcohols Phenols and Ethers Question with Solution

JEE Main 2023 (29 Jan Shift 1)

Question

The increasing order of pKa for the following phenols is

(A) 2,4-Dinitrophenol

(B) 4-Nitrophenol

(C) 2,4,5-Trimethylphenol

(D) Phenol

(E) 3-Chlorophenol

Choose the correct answer from the option given below :

Choose an option

Show full solutionCorrect option: B
Correct answer
B(A), (B), (E), (D), (C)

Step-by-step explanation

Order of acidity for following phenol is

Increasing order of pKa means most acidic will be placed first. 

- M groups at ortho and para position increases acidic strength in phenol. Hence, (A) is most acidic.

+M, Hyperconjugation, +I decreases Ka Value of 2,4,5-Trimethylphenol. Hence (C), is least acidity.

So, the order of pKa value is (A) < (B )< (E)< (D)< (C).

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Alcohols Phenols and Ethers chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2023, covering the Alcohols Phenols and Ethers chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.