NEET UG 2018 · Chemistry · Question 66
NEET 2018 Chemistry, question 66
Question 66 of the NEET 2018 paper (code AA) is a Chemistry question from Alcohols, Phenols and Ethers. Its idea, Reimer-Tiemann Reaction, was asked only this once in NEET 2017–2026. The CBSE official answer key gives option 4.
Updated 2026-10-08
Q66 · Chemistry
In the reaction
Phenol () + + NaOH sodium 2-formylphenoxide (ring with and ortho –CHO)
the electrophile involved is
The figure, described in words
Reimer–Tiemann reaction drawn: phenol + CHCl3 + NaOH gives ring with O−Na+ and ortho CHO.
- 1dichloromethyl anion ()
- 2formyl cation ()
- 3dichloromethyl cation ()
- 4dichlorocarbene ()Official answer
Official answer: option 4 · CBSE official answer key
Same idea
The only question on Reimer-Tiemann Reaction
No other NEET paper from 2017–2026 tested this exact idea.
Reimer-Tiemann Reaction: 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.