NEET UG 2021 · Zoology · Question 177
NEET 2021 Zoology, question 177
Question 177 of the NEET 2021 paper (code O1) is a Zoology question from Environmental Issues. Its idea, Dobson Units, was asked twice, in 2021 and 2023, across NEET 2017–2026. The NTA final answer key gives option 1.
Updated 2026-10-08
Q177 · Zoology
Dobson units are used to measure thickness of :
- 1OzoneOfficial answer
- 2Troposphere
- 3CFCs
- 4Stratosphere
Official answer: option 1 · NTA final answer key
Same idea
Dobson Units, in other papers
NEET asked this idea twice, in 2021 and 2023. The other question below.
- 2023 Q105The thickness of ozone in a column of air in the atmosphere is measured in terms of :One-line MCQ · Easy
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.