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Saturday, 31 October

JEE Main 2023 · ChemistryMultiple choiceDiagram basedEasyConceptual

JEE Main 6 April 2023, Shift 2, Chemistry Q78

Question 78 of 90 in this shift, Chemistry question 18 of 30, Section A.

The strongest acid from the following is

The figure, in words

Four substituted phenols drawn as structures (OH on benzene ring; meta NO2, meta Cl, meta CH3, unsubstituted).
  1. (1)[figure: phenol with NO2 at the meta position (3-nitrophenol)]Official answer
  2. (2)[figure: phenol with Cl at the meta position (3-chlorophenol)]
  3. (3)[figure: phenol with CH3 at the meta position (3-methylphenol)]
  4. (4)[figure: phenol]

Official answer

Option 1

NTA final key.

Chapter
Alcohols, Phenols and Ethers
Topic
Alcohols and Phenols
Idea tested
Phenol Acidity Comparison

Same idea in other shifts

Asked 8× in all
  1. 8 Apr 2024, Shift 2 · Q78Which one the following compounds will readily react with dilute NaOH ?EasySingle correct
  2. 9 Apr 2024, Shift 1 · Q77For the given compounds, the correct order of increasing pKa\mathrm{pK_a} value : (A) phenol (B) 4-nitrophenol (O2N\mathrm{O_2N} and OH para…MediumSingle correctHas a figure
  3. 27 Jan 2024, Shift 1 · Q74Given below are two statements : Statement (I) : p-nitrophenol is more acidic than m-nitrophenol and o-nitrophenol. Statement (II) :…EasyTwo statements
  4. 13 Apr 2023, Shift 2 · Q76Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Order of acidic nature…MediumAssertion–reasonHas a figure
  5. 25 Jul 2022, Shift 2 · Q75Arrange the following in decreasing acidic strength. (A) [figure: benzene ring with OH and NO2 para to each other] (B) [figure: benzene…EasyDiagram basedHas a figure
  6. 29 Jul 2022, Shift 1 · Q80A compound ‘X’ is acidic and it is soluble in NaOH solution, but insoluble in NaHCO3\mathrm{NaHCO_3} solution. Compound ‘X’ also gives violet…EasyDiagram basedHas a figure
  7. 29 Jun 2022, Shift 1 · Q80Given below are two statements. Statement I : Phenols are weakly acidic. Statement II : Therefore they are freely soluble in NaOH solution…EasyTwo statements

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.