UPSC Prelims 2010 Q109: Geography – Indian Physical Geography
- (a) 1 only
- (b) 1 and 3 only
- (c) 2 and 3 only
- (d) 1, 2 and 3
Answer: (d) 1, 2 and 3
Explanation
If the Himalayas didn't exist: checking three impacts
The Himalayas play several critical geographical roles for the Indian subcontinent.
| Statement | Verdict | Reason |
|---|---|---|
| 1. Much of the country would face Siberian cold waves | Correct | The Himalayas act as a climatic barrier, blocking cold air masses from Central Asia/Siberia from reaching India; without them, these cold waves would penetrate much further south |
| 2. Indo-Gangetic plain would lack extensive alluvial soils | Correct | The Himalayan rivers carry and deposit silt/alluvium that forms the Indo-Gangetic plain's fertile soils; without the Himalayas, this sediment source would be absent |
| 3. The monsoon pattern would be different | Correct | The Himalayas influence monsoon dynamics significantly, acting as a barrier that helps retain moisture-laden winds over the subcontinent; their absence would alter rainfall patterns |
Himalayas' geographical roles:
| Role | Impact if absent |
|---|---|
| Climatic barrier | Siberian cold waves would reach further south |
| Sediment source | Indo-Gangetic plain would lack its fertile alluvium |
| Monsoon influence | Rainfall patterns would be significantly different |
Answer: (d) 1, 2 and 3.
Why each option is right or wrong
- (a) Incorrect. Statements 2 and 3 (alluvial soils, monsoon pattern) are also correct impacts, so '1 only' is too narrow.
- (b) Incorrect. Statement 2 (alluvial soils) is also correct, so '1 and 3 only' is incomplete.
- (c) Incorrect. Statement 1 (Siberian cold waves) is also correct, so '2 and 3 only' wrongly excludes it.
- (d) CORRECT. All three impacts — Siberian cold waves reaching further south, loss of alluvial soils, and altered monsoon patterns — would genuinely result from the Himalayas' absence.
Key point
Without the Himalayas, India would experience ALL THREE impacts: Siberian cold waves reaching further south, the Indo-Gangetic plain lacking its alluvial soils, and a significantly altered monsoon pattern.
Remember
Without the Himalayas: Siberian cold waves would reach further south, the Indo-Gangetic plain would lack alluvial soils, and the monsoon pattern would be very different — all three are true.
Common mistakes
- Treating the Himalayas as only a climatic barrier, missing their role in sediment deposition and monsoon dynamics.
- Underestimating how interconnected these three impacts (climate, soil, monsoon) actually are.
- Assuming only one or two plausible-sounding geographical consequences can be true simultaneously.
Exam tip
The Himalayas serve THREE major roles for India: climatic barrier, sediment source for fertile plains, and monsoon-shaping barrier — all three listed impacts are genuine.
Sources
- NCERT Class XI Geography — India: Physical Environment — Structure and Physiography
- NCERT Class XI Geography — India: Physical Environment — Climate