QUESTION 7
GS3
10 marks
Discuss in detail the photochemical smog emphasizing its formation, effects and mitigation. Explain the 1999 Gothenburg Protocol.
WRITE IN
7 min
150 words
What the examiner wants
Explain how photochemical smog forms, its effects and mitigation, and the Gothenburg Protocol.
DiscussExplain the different sides of the issue, use evidence, and finish with a balanced view.
Demand-wise check
- 1Formation: NOx and VOCs react in sunlight to form ozone and PAN≈30 words
- 2Effects: respiratory illness, crop damage, haze≈30 words
- 3Mitigation: vehicle norms (BS-VI), public transport, VOC control≈30 words
- 4Gothenburg Protocol (1999): UNECE protocol to cut acidification, eutrophication and ground-level ozone≈30 words
Open in about 20 words and close in about 20.
Answer plan
FormationEffectsMitigationGothenburgConclusion
Where marks usually go
- Mixing up with sulphurous (London) smog
- Skipping the Gothenburg Protocol part
Draw this
- Reaction diagram
Value addition
- FactGothenburg Protocol (1999) under UNECE's LRTAP Convention sets emission ceilings for SO2, NOx, VOCs and ammonia.UNECE
- PolicyIndia moved directly from BS-IV to BS-VI fuel norms in April 2020.Ministry of Road Transport and Highways
Mapped topper copies
Reviewed public-source references related to this PYQ. Same-syllabus references are labelled separately.
- Shakti Dubey · AIR 1 · Page 41 ↗Same syllabus reference
- Aniket Ranjan · AIR 48 · Page 41 ↗Same syllabus reference
- Aniket Ranjan · AIR 48 · Page 15 ↗Same syllabus reference
- Shakti Dubey · AIR 1 · Page 17 ↗Same syllabus reference
Links open original public sources. MainsBuddy does not host these answer sheets.
Next: plan for one minute, write it in 7 minutes, then get it checked.