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Predicted Questions with Model Answers
Q1 (5 marks — 50 words): How were the Himalayas formed? Distinguish between Himadri, Himachal, and Shiwaliks.
Model Answer:
The Himalayas are fold mountains formed by the collision of the Indian and Eurasian plates, compressing Tethys Sea sediments upward (~70–40 million years ago). Himadri (Inner Himalayas) is the highest range, averaging 6,000 m, with perpetual snow. Himachal (Middle Himalayas) averages 3,700–4,500 m; contains hill stations like Shimla. Shiwaliks (Outer Himalayas) are youngest, 600–1,500 m, formed from eroded debris; Duns (like Dehra Dun) lie between them and Himachal.
Q2 (5 marks — 50 words): What are Bhabar, Terai, Bangar, and Khadar? Why is Khadar the most fertile?
Model Answer:
Bhabar is a porous gravel belt at Himalayan foothills where rivers sink underground. Terai lies south of Bhabar — swampy, waterlogged, rivers re-emerge. Bangar is elevated older alluvium containing calcareous nodules (Kankar). Khadar is the active floodplain receiving fresh alluvium annually from Himalayan rivers, making it most fertile — nutrient-rich, fine-grained silt ideal for wheat, rice, and sugarcane cultivation.
Q3 (5 marks — 50 words): Compare Western Ghats and Eastern Ghats.
Model Answer:
Western Ghats (Sahyadri): 1,600 km long, continuous, average 1,200 m elevation; highest peak Anamudi (2,695 m); steep western face forces heavy SW monsoon rainfall (2,500–4,000 mm); UNESCO World Heritage biodiversity hotspot. Eastern Ghats: discontinuous (cut by major rivers), average 600 m; highest peak Jindhagada (1,690 m); gentler topography; receives NE monsoon; rich in bauxite and iron ore. Both meet in Nilgiris (Dodda Betta, 2,637 m).
Q4 (5 marks — 50 words): Write a note on India's island territories.
Model Answer:
India has two island groups: Andaman and Nicobar Islands (Bay of Bengal) — 572 islands, 8,249 sq km; India's southernmost point Indira Point (6°45'N) on Great Nicobar; Barren Island (active volcano); capital Port Blair. Lakshadweep (Arabian Sea) — 36 coral atolls, 32 sq km (India's smallest UT); capital Kavaratti; closest to Maldives. Both are strategically important — A&N commands Malacca Strait access.
Q5 (10 marks — 150 words): Describe the major physiographic divisions of India. How do they influence India's economy?
Model Answer:
India comprises six major physiographic divisions that collectively shape its economy:
1. Himalayan Mountains (5 lakh sq km): India's northern wall formed by Indo-Eurasian plate collision. Three parallel ranges — Himadri (>6,000 m), Himachal (3,700–4,500 m), and Shiwaliks (600–1,500 m). Provides perennial rivers (Indus, Ganga, Brahmaputra systems) through glacier melt; strategic mountain passes (Nathu La, Zoji La); hydropower potential; tourism; serves as climatic and defence barrier.
2. Indo-Gangetic Plain (7.5 lakh sq km): World's largest alluvial plain — 2,400 km long, divided into Bhabar, Terai, Bangar, and Khadar. Provides India's agricultural heartland; 40% of food grain output. Most densely populated region; major industrial centers (Kanpur, Ludhiana, Patna).
3. Peninsular Plateau (16 lakh sq km): Gondwana-origin; oldest landmass. Deccan Trap basalts yield black cotton soil for cotton, soybean. Contains India's richest mineral belt — coal (Damodar), iron ore (Bailadila), bauxite (Odisha), manganese (Odisha, Goa). Hydropower from east-flowing rivers (Mahanadi, Godavari, Krishna).
4. Thar Desert (2.09 lakh sq km): Harsh environment with <250 mm rainfall. However, IGNP brings water for agriculture. Rich in mineral salts (Sambhar Lake — salt production), gypsum, lignite. India's highest solar energy potential lies here (Rajasthan Solar Park, Bhadla).
5. Coastal Plains: Western coast's natural harbours (Mumbai, Cochin) support trade; eastern coast's major river deltas produce surplus rice. Kerala's backwaters drive tourism. Total coastline 7,516 km facilitates maritime trade.
6. Islands: Andaman & Nicobar's strategic position controls Malacca Strait; Lakshadweep's coral ecosystem supports marine tourism and fisheries.
Q6 (10 marks — 150 words): Discuss the significance of the Peninsular Plateau in India's mineral economy.
Model Answer:
The Peninsular Plateau — a remnant of ancient Gondwana landmass composed of Archaean crystalline rocks — is India's primary mineral storehouse, contributing the bulk of India's coal, iron ore, manganese, bauxite, copper, and diamond production.
Coal: The Gondwana rock formations underlying the plateau contain India's entire coal reserves. Key coalfields: Damodar Valley (Jharia, Raniganj — Jharkhand/West Bengal, India's richest), Mahanadi Basin (Talcher, Ib — Odisha), Godavari Valley (Singareni — Telangana), Wardha Valley (Maharashtra). Total India coal reserves: ~344 billion tonnes.
Iron Ore: Banded Haematite Quartzite (BHQ) formations: Bailadila (Chhattisgarh), Singhbhum (Jharkhand), Hospet-Bellary (Karnataka). India has 4th largest iron ore reserves globally (~28.5 billion tonnes).
Bauxite: Odisha (Panchpat Mali, Kalahandi), Andhra Pradesh (Visakhapatnam), Gujarat. India is world's 5th largest bauxite producer.
Manganese: Odisha (Kandhamal), Madhya Pradesh, Goa, Maharashtra.
Diamonds: Panna (Madhya Pradesh) — India's only diamond-producing district; Golconda historically.
Copper: Singhbhum (Jharkhand), Khetri (Rajasthan — at the Aravalli edge of the plateau).
Hydropower: Plateau rivers — Mahanadi, Godavari, Krishna, Kaveri — have major dam projects (Hirakud, Nagarjunasagar, Mettur) for irrigation and power.
The plateau's geological stability, ancient rock composition, and mineral-rich terrain make it indispensable for India's manufacturing and energy sectors. However, intensive mining has led to deforestation, displacement of tribal communities (Adivasis), and environmental degradation — particularly in Jharkhand, Odisha, and Chhattisgarh.