Thursday Teaser Quiz: 12 Geography and Environment MCQs from This Week’s Posts

Quick Answer: This Thursday Teaser packs 12 timed multiple-choice questions drawn from this week’s four posts on Indian rivers, Ramsar sites, greenhouse gases and the monsoon. You get one minute per question, a simple +1 marking scheme with no negative marking, and every fact cross-checked against IMD, MoEFCC–Ramsar records and IPCC GWP values — exam-style framing for UPSC Prelims, SSC CGL, Banking GA and CLAT.

Quiz Snapshot: What This Week’s Teaser Covers

This week our Geography and Environment desk published four study posts: Indian rivers and drainage, Ramsar sites in India, greenhouse gases and their warming potential, and the southwest monsoon mechanism. This teaser distils all four into a single timed practice session. Here is how the 12 questions map to the parent posts:

How to Attempt This Quiz

• Timer: Set a 12-minute timer — one minute per question. If a question stalls you, mark it, move on, and return only if time remains.
• Marking: Each correct answer earns +1, for a maximum score of 12. This is a practice teaser, so there is no negative marking here — but remember UPSC Prelims deducts one-third per wrong answer, so treat wild guessing as a habit to unlearn.
• Honesty rule: Attempt all 12 before opening the answer key. No notes, no search engine, no second tab.
• Review loop: After scoring, read the explanation for every question — including the ones you got right. The explanation names the source post you should revisit.

Questions 1–3: Indian Rivers and Drainage

Q1. The Godavari, the largest peninsular river, rises at:
(a) Mahabaleshwar (b) Amarkantak (c) Trimbakeshwar near Nashik (d) Talakaveri

Q2. Which of the following is the longest tributary of the Ganga?
(a) Son (b) Yamuna (c) Ghaghara (d) Gandak

Q3. The Narmada and the Son, both rising on the Amarkantak plateau, together illustrate which drainage pattern?
(a) Dendritic (b) Trellis (c) Radial (d) Annular

Questions 4–6: Ramsar Sites and Wetlands

Q4. The Ramsar Convention on Wetlands was adopted in 1971 at:
(a) Geneva (b) Ramsar, Iran (c) Kyoto (d) Montreal

Q5. Which state currently hosts the highest number of India’s Ramsar sites?
(a) Uttar Pradesh (b) Gujarat (c) Tamil Nadu (d) Madhya Pradesh

Q6. As per the latest verified update (2025), India’s Ramsar site tally stands at:
(a) 75 (b) 82 (c) 85 (d) 89

Questions 7–9: Greenhouse Gases and Climate

Q7. The most abundantly emitted anthropogenic greenhouse gas by volume is:
(a) Methane (CH₄) (b) Carbon dioxide (CO₂) (c) Nitrous oxide (N₂O) (d) Sulphur hexafluoride (SF₆)

Q8. Among the commonly discussed greenhouse gases, the highest global warming potential (GWP) belongs to:
(a) N₂O (b) CH₄ (c) SF₆ (d) CO₂

Q9. The dominant anthropogenic source of nitrous oxide emissions is:
(a) Cement production (b) Nitrogen fertiliser use in agriculture (c) Rice paddies (d) Refrigerant leakage

Questions 10–12: Monsoon Mechanism and Patterns

Q10. As per IMD’s revised normal dates, the southwest monsoon normally sets in over Kerala on:
(a) 25 May (b) 1 June (c) 8 June (d) 15 June

Q11. During a “break” in the Indian monsoon, the monsoon trough (the seasonal ITCZ) shifts to:
(a) The foothills of the Himalayas (b) The southern peninsula (c) The central Arabian Sea (d) It remains stationary over central India

Q12. Relatively low rainfall on the leeward Deccan plateau (for instance, around Pune) is chiefly explained by:
(a) Subtropical high pressure (b) The rain-shadow effect of the Western Ghats (c) A cold ocean current (d) El Niño

Answer Key with Explanations

1. (c) Trimbakeshwar near Nashik — The Godavari rises in the Western Ghats and runs about 1,465 km to the Bay of Bengal; called the “Dakshin Ganga.” From this week’s Indian Rivers and Drainage: Exam-Ready Notes.
2. (b) Yamuna — Rising at Yamunotri and joining the Ganga at Prayagraj, it is the longest Ganga tributary. The Ghaghara is the largest by discharge — a distinction exams love to test.
3. (c) Radial — Streams flowing outward from a central dome or peak form a radial pattern; Amarkantak (Maikal Hills), sending the Narmada west and the Son east, is the textbook example.
4. (b) Ramsar, Iran — Adopted 2 February 1971 (in force 1975), now covering more than 2,400 sites worldwide. Verify global figures at ramsar.org.
5. (c) Tamil Nadu — With 18 Ramsar sites, including the August 2024 additions of Nanjarayan and Kazhuveli Bird Sanctuaries; Uttar Pradesh follows with 10.
6. (d) 89 — The August 2024 trio (Nanjarayan, Kazhuveli, Tawa Reservoir) took India to 85, and subsequent 2025 additions carried the verified tally to 89. Because the number rises through the year, cross-check the live count on the Ramsar Sites Information Service (rsis.ramsar.org) or MoEFCC (moef.gov.in) before exam day.
7. (b) CO₂ — Carbon dioxide accounts for the bulk of anthropogenic GHG emissions (roughly three-fourths). Water vapour is the most abundant GHG overall, but it is not counted as a primary anthropogenic driver — read stems carefully.
8. (c) SF₆ — Sulphur hexafluoride, used in electrical switchgear, has a GWP thousands of times CO₂’s baseline of 1 (about 18,000–24,000 across IPCC assessments), far above N₂O (≈273) and CH₄ (≈27–30). See ipcc.ch and EPA’s greenhouse gas overview.
9. (b) Nitrogen fertiliser use — Agricultural soils and manure dominate N₂O sources; paddy fields and landfills are methane sources, while refrigerant leakage points to HFCs.
10. (b) 1 June — IMD’s revised normals (2020) keep 1 June for Kerala onset; the monsoon now covers the entire country by about 8 July. Declaration criteria combine rainfall, low-level westerlies and outgoing longwave radiation — details at mausam.gov.in.
11. (a) Foothills of the Himalayas — When the trough migrates north, rainfall over the plains weakens while the Himalayas and the north-east get wetter.
12. (b) Rain-shadow effect — Windward Western Ghats slopes soak up the monsoon; descending air on the leeward side warms and dries, leaving the interior plateau comparatively dry.

Score Analysis: Where You Stand

• 0–4 correct: The base needs rebuilding. Re-read NCERT Class XI India: Physical Environment chapters on drainage and climate before retrying the parent posts.
• 5–7 correct: Moderate zone. Your concepts are intact; the leaks are likely current-affairs numbers — Ramsar tally, GWP ranks, revised IMD dates.
• 8–10 correct: Strong. You are within striking distance of exam standard; patch the two missed themes using the revision table below.
• 11–12 correct: Exam-ready. Keep the streak alive with next Thursday’s teaser and push your accuracy into negative-marking territory.

Common Mistakes Aspirants Made This Week

• Stale Ramsar counts: Several readers quoted 75 or 85 — the 2023 and 2024 figures — as “current.” Always date-stamp the number (89 as of the 2025 update) and verify before exam day.
• GWP ranking mix-ups: Many placed methane above nitrous oxide. Correct order: CO₂ (1) < CH₄ (≈27–30) < N₂O (≈273) < SF₆ (thousands).
• “Most abundant” traps: Water vapour is the most abundant GHG; CO₂ is the most abundantly emitted anthropogenic one. The stem decides the answer.
• Monsoon date drift: Writing 15 July for countrywide coverage; the revised normal is 8 July, with Kerala onset on 1 June.
• Break-direction error: During a break, the trough shifts north to the Himalayan foothills, not south.
• Longest vs largest tributary: Yamuna is the longest Ganga tributary; Ghaghara is the largest by volume.

Quick Revision Table

Links to This Week’s Source Posts

Every question above was lifted from these four parent posts published this week on the site’s Geography and Environment category — open them for full notes, maps and one-liners:

• Indian Rivers and Drainage Systems: Exam-Ready Notes — parent post for Questions 1–3.
• Ramsar Sites in India 2025: Updated List and Wetland Ecology One-Pager
  

  Related reading

  • Monsoon Mechanism Explained: Jet Streams, ITCZ and Tibetan Plateau Role for UPSC Prelims
  • Monsoons Decoded: Jet Streams, ITCZ Shift and Why Monsoon Retreat Gets Delayed — Geography Notes for UPSC & SSC

  Quick revision

  • Timer: Set a 12-minute timer — one minute per question. If a question stalls you, mark it, move on, and return only if time remains.
  • Marking: Each correct answer earns +1, for a maximum score of 12.
  • Honesty rule: Attempt all 12 before opening the answer key. No notes, no search engine, no second tab.
  • Review loop: After scoring, read the explanation for every question — including the ones you got right. The explanation names the source post you should revisit.
  • (c) Trimbakeshwar near Nashik: — The Godavari rises in the Western Ghats and runs about 1,465 km to the Bay of Bengal; called the “Dakshin Ganga.” From this…
  • (b) Yamuna: — Rising at Yamunotri and joining the Ganga at Prayagraj, it is the longest Ganga tributary.
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  Monsoon Mechanism Explained: Jet Streams, ITCZ and Tibetan Plateau Role for UPSC Prelims

  

  Monsoons Decoded: Jet Streams, ITCZ Shift and Why Monsoon Retreat Gets Delayed — Geography Notes for UPSC & SSC

  

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