NEET UG 2018 · Botany · Question 116
NEET 2018 Botany, question 116
Question 116 of the NEET 2018 paper (code AA) is a Botany question from Environmental Issues. Its idea, Chlorine's Catalytic Nature, was asked only this once in NEET 2017–2026. The CBSE official answer key gives option 2.
Updated 2026-10-08
Q116 · Botany
In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen ?
- 1Fe
- 2ClOfficial answer
- 3Carbon
- 4Oxygen
Official answer: option 2 · CBSE official answer key
Same idea
The only question on Chlorine's Catalytic Nature
No other NEET paper from 2017–2026 tested this exact idea.
Chlorine's Catalytic Nature: every question and how it was framed
The chapter
Environmental Issues in ten years of NEET
19 questions from 2017–2026, asked in 7 of 10 papers, about 1.8 a paper. Ozone Depletion alone had 5.