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Friday, 9 October

NEET UG 2018 · Chemistry · Question 52

NEET 2018 Chemistry, question 52

Question 52 of the NEET 2018 paper (code AA) is a Chemistry question from Alcohols, Phenols and Ethers. Its idea, Cumene Process, was asked twice, in 2018 and 2019, across NEET 2017–2026. The CBSE official answer key gives option 4.

Updated 2026-10-08

Q52 · Chemistry

Identify the major products P, Q and R in the following sequence of reactions :

Benzene + CH3CH2CH2Cl\mathrm{CH_3CH_2CH_2Cl} →Anhydrous AlCl3\xrightarrow{\text{Anhydrous AlCl}_3} P →(i) O2, (ii) H3O+/Δ\xrightarrow{\text{(i) O}_2\text{, (ii) H}_3\text{O}^+/\Delta} Q + R

P, Q, R

The figure, described in words

Reaction scheme with benzene ring drawn; options give P, Q, R as drawn benzene-ring structures (cumene / n-propylbenzene, phenol / benzaldehyde, benzoic acid).

  1. 1C6H5CH(CH3)2\mathrm{C_6H_5CH(CH_3)_2} (cumene), C6H5OH\mathrm{C_6H_5OH} (phenol), CH3CH(OH)CH3\mathrm{CH_3CH(OH)CH_3}
  2. 2C6H5CH2CH2CH3\mathrm{C_6H_5CH_2CH_2CH_3}, C6H5CHO\mathrm{C_6H_5CHO}, C6H5COOH\mathrm{C_6H_5COOH}
  3. 3C6H5CH2CH2CH3\mathrm{C_6H_5CH_2CH_2CH_3}, C6H5CHO\mathrm{C_6H_5CHO}, CH3CH2−OH\mathrm{CH_3CH_2-OH}
  4. 4C6H5CH(CH3)2\mathrm{C_6H_5CH(CH_3)_2} (cumene), C6H5OH\mathrm{C_6H_5OH} (phenol), CH3−CO−CH3\mathrm{CH_3-CO-CH_3}Official answer

Official answer: option 4 · CBSE official answer key

Same idea

Cumene Process, in other papers

NEET asked this idea twice, in 2018 and 2019. The other question below.

  • 2019 Q47The structure of intermediate A in the following reaction, is : C₆H₅–CH(CH₃)₂ (cumene) →O2\xrightarrow{O_2} A →H+,H2O\xrightarrow{H^+, H_2O}…Figure-based · Medium

Cumene Process: every question and how it was framed

The chapter

Alcohols, Phenols and Ethers in ten years of NEET

15 questions from 2017–2026, asked in 7 of 10 papers, about 1.4 a paper. Alcohols and Phenols alone had 15.

Chapter analysisStudy this chapterPractise this chapter

Alcohols, Phenols and Ethers: questions per paper

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