Environmental Issues is a Class 12 Biology chapter that carries about 2.0% of the Biology questions in NEET. Practise it with 47 questions covering 3 topics, each with an explanation.
Sets of 15 questions that adapt to your level, with an explanation for every answer.
Across the 13 previous year papers, Environmental Issues had 25 questions, about 1.9 a year. The most in one paper was 5, in Re-AIPMT 2015.
| Paper | Questions from this chapter |
|---|---|
| NEET 2026 | 0 |
| NEET 2025 | 0 |
| NEET 2024 | 0 |
| NEET 2023 | 0 |
| NEET 2022 | 3 |
| NEET 2021 | 1 |
| NEET 2020 | 2 |
| NEET 2019 | 4 |
| NEET 2018 | 4 |
| NEET 2017 | 1 |
| NEET 2016 | 2 |
| Re-AIPMT 2015 | 5 |
| AIPMT 2014 | 3 |
8 questions from the practice bank, spread across the chapter's topics. The full set is in the app.
The metals used as catalysts in a catalytic converter are:
Answer: B. platinum, palladium and rhodium
Why: Vehicles with these converters must use unleaded petrol, as lead inactivates the catalysts.
Which of the following is the order of the contribution of the gases to the greenhouse effect?
Answer: D. CO₂ (about 60%), CH₄ (20%), CFCs (14%), N₂O (6%)
Why: The share of CO₂ is the highest.
'Snow-blindness' in humans is caused by:
Answer: A. inflammation of the cornea due to a high dose of UV-B radiation
Why: It is like a sunburn of the cornea.
The Air (Prevention and Control of Pollution) Act was passed in India in the year:
Answer: C. 1981
Why: The amendment of 1987 included noise as an air pollutant.
Deforestation leads to:
Answer: B. soil erosion, loss of biodiversity, and an increase in the carbon dioxide level
Why: Trees absorb CO₂ and maintain the water cycle.
The chlorine released from the CFCs, in the ozone depletion, acts as:
Answer: C. a catalyst; one chlorine atom can degrade a very large number of ozone molecules
Why: The reaction is a chain reaction.
The Ganga Action Plan and Yamuna Action Plan were launched to:
Answer: A. save the rivers from pollution by sewage and industrial effluents
Why: They were launched by the Ministry of Environment and Forests.
The Montreal Protocol, an international agreement, specifically addresses:
Answer: B. phasing out substances that deplete the ozone layer
Why: Signed in 1987, the Montreal Protocol commits nations to phase out the production of ozone-depleting substances such as CFCs.
Environmental Issues carries about 2.0% of the Biology questions in NEET. Across the 13 previous year papers on NeetVictory it appeared 25 times, about 1.9 questions a year.
Environmental Issues is a Class 12 Biology chapter in the NCERT syllabus.
NeetVictory has 47 practice questions on Environmental Issues, each with an explanation, in sets of 15 that adapt to your level. This page shows a free sample.
NeetVictory