Ch 2: Physical Features of India

This section introduces the six major physiographic divisions (Northern Mountains, Northern Plains, Peninsular Plateau, Coastal Plains, Coastal Plateaus/Ghats, Islands) that serve as the framework for all subsequent chapters. UPSC repeatedly tests which states/regions fall into which division and the characteristics that define each. Memorize the exact boundaries and transition zones—e.g., the Eastern Ghats are often confused with Western Ghats. Do not skip the conceptual reason for these divisions (geological age, structural origin). Trap: Students confuse 'Coastal Plains' (narrow strips along Arabian Sea and Bay of Bengal) with 'Peninsular Plateau' (Deccan Plateau itself).

Covers the Himalayan system, the youngest and highest mountain range, subdivided into Great Himalayas, Lesser Himalayas, and Shiwaliks. UPSC heavily tests: (1) the three-fold division of Himalayas and their altitude/characteristics; (2) major peaks (Mt. Kanchenjunga, Mt. Everest) and their locations; (3) geological significance (ongoing orogeny, fold mountains); (4) passes (Khyber, Nathula, Rohtang) and their strategic importance. Expect map-based questions on which peaks belong to which range. Do not waste time on minor tributaries but master the main Himalayan rivers (Indus, Sutlej, Brahmaputra systems). Recurring trap: confusing the three Himalayan zones—use their altitude and vegetation as mnemonics.

Covers the Indo-Gangetic-Brahmaputra plain, formed by alluvial deposits and the largest plain in India. UPSC tests: (1) origin (denudation and alluvial deposition); (2) sub-divisions (Punjab, Gangetic, Brahmaputra plains); (3) why this region is most fertile and densely populated; (4) the concept of 'bhabar' and 'terai' zones in the piedmont region—these are high-frequency terms in environment and agriculture questions. Memorize that this plain is a structural depression filled with alluvium up to 6 km deep. Do not confuse bhabar (porous, dry, no vegetation) with terai (marshy, waterlogged). These distinctions have appeared in UPSC MCQs on agro-climatic zones.

Covers the Deccan Plateau, composed of igneous rock (basalt), and bounded by the Western and Eastern Ghats. UPSC tests: (1) the characteristics and boundaries of the Deccan Plateau; (2) the Western Ghats (higher, continuous, steeper western slope) vs. Eastern Ghats (lower, discontinuous, gentler slope)—this distinction is critical and frequently tested; (3) major plateau features (Malwa, Chhota Nagpur, Telangana plateaus); (4) the concept of 'Deccan Lava' and its role in soil formation and agriculture. High-yield fact: Western Ghats are a biodiversity hotspot and have shaped India's monsoon pattern—expect questions linking this to climate and vegetation. Do not spend excessive time on minor uplands but focus on Chhota Nagpur Plateau's mineral wealth as it connects to economy chapters.

Covers the narrow coastal strips on the Arabian Sea (Western Coastal Plain) and the Bay of Bengal (Eastern Coastal Plain), and the associated plateaus (Western and Eastern Ghats already covered above). UPSC tests: (1) why the Western Coastal Plain is narrower than the Eastern—related to plateau proximity; (2) major coastal features (deltas like Sundarbans, lagoons like Chilika, backwaters of Kerala); (3) the economic and strategic importance of ports located here. Lower yield than the plateau itself. Do not memorize every lagoon name, but know major ones (Chilika, Vembanad) and their significance. Trap: confusing 'coastal plain' (flat, alluvial land) with 'coastal plateau' (not typically used—usually refers to plateaus near coast like those in Maharashtra/Karnataka).

Covers Andaman & Nicobar Islands (volcanic, young, east of mainland) and Lakshadweep Islands (coral, low-lying, west of mainland). UPSC tests: (1) the origin and geological age of each island group; (2) their strategic location and exclusive economic zone (EEZ) implications; (3) biodiversity (endemic species, coral reefs); (4) population and administration details. Lower-frequency testing than mainland physiography but critical for questions on biodiversity hotspots and maritime boundaries. Specific fact: Andaman & Nicobar are part of the Indo-Pacific region's ring of fire; Lakshadweep are coral atolls. Do not confuse their origins—this is a classic trick in MCQs.