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UPSC 2022: Consider the following: 1. Carbon monoxide 2. Nitrogen oxide 3. Ozone 4. Sulphur dioxide Excess of which of the above in the environment is/are cause(s) of acid rain?
(a)1, 2 and 3
(b)2 and 4 only
(c)4 only
(d)1, 3 and 4
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Not attemptedCorrect Answer: (b) 2 and 4 only
Acid rain forms when sulphur dioxide (SO₂) and nitrogen oxides (NOₓ) react with atmospheric moisture to produce sulphuric and nitric acids. Carbon monoxide and ozone do not create these acids. Hence only statements 2 (NOₓ) and 4 (SO₂) are relevant, making option (b) correct. ([forumias.com](https://forumias.com/blog/answer-key-upsc-ias-cse-prelims-2022-gs-paper-1-questions/?utm_source=openai))
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Frequently Asked Questions
What is the correct answer to this UPSC 2022 Environment & Ecology question?▼
The correct answer is option (b): 2 and 4 only. Watch the detailed video explanation in our Sherlocking Prelims course on UnlockIAS.
Which year was this Pollution & Waste Management question asked in UPSC Prelims?▼
This question was asked in UPSC CSE Prelims 2022, GS Paper 1, as Question 100. It falls under Environment & Ecology > Pollution & Waste Management.
What is the difficulty level of this UPSC question?▼
This question is rated "easy". It tests basic recall and most well-prepared aspirants should answer it correctly.
How many UPSC Prelims questions have been asked from Pollution & Waste Management?▼
UPSC has asked 38 questions from Pollution & Waste Management (under Environment & Ecology) across multiple years. Visit the topic page to see the full list and year-wise trends.