NDA Geography · Teaching notes

Indian Geography — Physical Features — NDA Geography

This is one of the two biggest chapters in NDA Geography — 67 PYQs across 2017–2026 — and it is pure named-fact recall: which peak, which river, which pass, which soil, which state. There is almost no process to trace here; the marks go to whoever has memorised the map of India cleanly. So the chapter is built as a set of organised lookup tables rather than long explanations, and it teaches in the order a student should walk the country: (1) Location, extent and frontiers of India — where India sits, its east-west sunrise gap, coastline and land neighbours; (2) Mountains, plateaus and plains of India — the physiographic divisions, Himalayan ranges and passes, the Peninsular Plateau, the alluvial belts of the plains; (3) Indian rivers, lakes and water bodies — the Himalayan vs Peninsular river systems, tributaries, lakes, river features and waterways; (4) Indian soils and climate-agriculture — the soil types and their crops, the monsoon and its quirks; (5) Forests and natural vegetation of India — vegetation belts, forest cover, biosphere reserves and protected areas; (6) Indian states and islands — borders, state facts, islands and coral reefs. Most questions are EASY/MODERATE; the HARD ones are the match-the-list and arrange-in-order items. Drill the tables, win the marks.

Subtopic notes

PYQ weightage by concept

23 concepts · 67 PYQs — where the marks actually sit, so you know what to drill first

Location, Extent and Frontiers of India5 PYQs · 7%
ConceptPYQsShare
India's location, extent and the sunrise gap34%
Coastline and land frontiers23%
Mountains, Plateaus and Plains of India7 PYQs · 10%
ConceptPYQsShare
Himalayan passes and their ranges/states23%
The Peninsular Plateau and the Ghats23%
The four physiographic divisions11%
The Himalayan ranges, north to south11%
The alluvial belts of the Northern Plains11%
Indian Rivers, Lakes and Water Bodies27 PYQs · 40%
ConceptPYQsShare
The Indus system and its rivers57%
Alternative names, confluences, dams and river islands57%
Himalayan vs Peninsular river systems and their origins46%
Rivers and their tributaries46%
River basins, drainage patterns and inland waterways46%
Famous lakes of India and their states34%
East-flowing vs west-flowing peninsular rivers23%
Indian Soils and Climate-Agriculture10 PYQs · 15%
ConceptPYQsShare
The Indian monsoon and its climate quirks69%
Indian soils and the crops they suit34%
Köppen climate types of India11%
Forests and Natural Vegetation of India14 PYQs · 21%
ConceptPYQsShare
Natural vegetation belts and tree species57%
Forest cover rankings (India State of Forest Report)46%
Tiger reserves, biosphere reserves and sanctuaries34%
World grasslands and forest-fire current affairs23%
Indian States and Islands4 PYQs · 6%
ConceptPYQsShare
State borders, size and economy facts23%
Andaman & Nicobar, Lakshadweep and coral reefs23%

Formula & revision sheet

0 formulas · 15 reference tables · 14 gotchas across all subtopics — the exam-eve cheat-sheet

Location, Extent and Frontiers of India

Reference tables (1)

Coastline and land frontiers3 rows
QuestionAnswer
Longest coastline among Odisha/TN/Karnataka/WBTamil NaduQ
NDA 2017 — among the listed states; Gujarat is longest overall but was not an option.
NE state that does NOT border 2+ countriesTripura (only Bangladesh)Q
NDA 2020 — Tripura touches just one country; Arunachal/Mizoram touch two or more.
Number of land neighbours of IndiaSeven

Watch out for (2)

Mountains, Plateaus and Plains of India

Reference tables (3)

Himalayan passes and their ranges/states4 rows
PassRange / location
Zoji LaGreat HimalayasQ
NDA 2024 — Zoji La / Banihal / Photu La range-matching.
Banihal PassPir Panjal range
Khardung LaKarakoram range
Bomdi La, Bum La, YonggyapArunachal PradeshQ
NDA 2026 — Muling La is the impostor; it is NOT a pass of Arunachal Pradesh.
The alluvial belts of the Northern Plains4 rows
BeltWhat it is
BhabarPorous boulder/gravel belt below the Shiwaliks; rivers go undergroundQ
NDA 2023 — the belt where rivers deposit rocks and boulders is the Bhabar.
TaraiMarshy, re-emergent belt south of the Bhabar
BhangarOld, higher alluvium
KhadarNew floodplain alluvium (most fertile)
The Peninsular Plateau and the Ghats3 rows
FeatureFact
MahendragiriHighest peak of the Eastern Ghats — in OdishaQ
NDA 2025 — Mahendragiri is in Odisha.
Nilgiri HillsWhere the Eastern and Western Ghats meet (southern point of the plateau)Q
NDA 2023 — statement 1 (Ghats meet at the Nilgiris) is correct; the Cardamom Hills are NOT an Eastern-Ghats continuation.
Cardamom HillsSouthern continuation of the WESTERN Ghats

Watch out for (3)

Indian Rivers, Lakes and Water Bodies

Reference tables (3)

Rivers and their tributaries4 rows
RiverTributariesWatch-out
KaveriHemavati, Kabini, Arkavati, AmravatiIndravati is NOT a Kaveri tributary (it is Godavari's)
Indravati is the impostor in a Kaveri-tributary list.
GodavariIndravati, Manjra, PengangaPenganga is Godavari's, NOT Ganga's
KrishnaBhima, Tungabhadra
BrahmaputraManas, Kameng, SubansiriMahananda is NOT a tributaryQ
NDA 2021 — Mahananda is the odd one out in a Brahmaputra-tributary list.
Famous lakes of India and their states3 rows
LakeStateType / note
LonarMaharashtraCrater (impact) lakeQ
NDA 2021 — Lonar is the crater lake; the others listed are salt/lagoon/backwater.
LoktakManipurFloating-island (phumdi) lakeQ
NDA 2019 — Loktak is in Manipur.
RoopkundUttarakhandGlacial 'skeleton lake'Q
NDA 2023 — Roopkund is in Uttarakhand.
Alternative names, confluences, dams and river islands5 rows
FeatureAnswer
Sarda's name before the plainsKaliQ
NDA 2019 — the Sarda is the Kali in the hills.
Rudraprayag confluenceAlaknanda + MandakiniQ
NDA 2017 — Rudraprayag is where the Mandakini meets the Alaknanda.
River island MajuliOn the BrahmaputraQ
NDA 2018 — Majuli is on the Brahmaputra.
Krishna Raja Sagara damOn the KaveriQ
NDA 2020 — KRS is on the Kavery.
Garhwal basin townsBhagirathi-Uttarkashi, Alaknanda-Pauri, Nayar-Lansdowne, Ganga-Narendra NagarQ
NDA 2018 — match the Garhwal town to its river basin.

Watch out for (2)

Indian Soils and Climate-Agriculture

Reference tables (2)

Indian soils and the crops they suit3 rows
SoilKey fact / crop
Black soil (Regur)Cotton soil; moisture-retentive, lime-rich, clayeyQ
NDA 2023 — regur is the ideal cotton soil; NDA 2024 — 'less clay factor' is the FALSE statement about black soil.
Laterite soilHolds appreciable calcium among the listed nutrientsQ
NDA 2024 — calcium is the answer for laterite (it is poor in N, P and potash).
Alluvial soilFertile soil of the plains and deltas
Köppen climate types of India4 rows
Climate codeRegion
Amw (short dry season)Kerala & Karnataka coastQ
NDA 2017 — climate-type ↔ state match-list.
Dfc (cold humid winter)Arunachal Pradesh
Cwg (dry winter)Uttar Pradesh & Bihar
As (dry summer)Tamil Nadu coast

Watch out for (2)

Forests and Natural Vegetation of India

Reference tables (4)

Natural vegetation belts and tree species4 rows
Vegetation cueRegion / answer
Largest-area vegetationTropical deciduous forestQ
NDA 2021 — tropical deciduous (monsoon) forest covers the most area.
Khair, Neem, Khejri, PalasDesert regionQ
NDA 2022 — these dry-thorn trees indicate the Desert region.
Shola (temperate S. India)Anaimalai, Nilgiris, Palani hillsQ
NDA 2025 — Sholas occur in all three: Anaimalai, Nilgiris, Palani.
Himalayan treesOak + Rhododendron (NOT Rosewood)Q
World grasslands and forest-fire current affairs2 rows
ItemAnswer
Hot-summer/cold-winter low-rain grasslandPrairiesQ
NDA 2024 — these characteristics describe the Prairies.
Uttarakhand / Kullu / Dzukou Valley in the newsForest firesQ
NDA 2022 — the reason these forests were in the news.
Forest cover rankings (India State of Forest Report)3 rows
RankingAnswer
Largest forest cover by AREA (older)Madhya PradeshQ
NDA 2017 — by area, the largest forest cover is Madhya Pradesh.
Largest forest cover by AREA (ISFR 2021)Arunachal PradeshQ
NDA 2022 — per the 2021 report, Arunachal Pradesh (among the listed states).
Highest forest % among Himalayan statesArunachal PradeshQ
NDA 2025 — highest percentage of geographical area under forest.
Tiger reserves, biosphere reserves and sanctuaries3 rows
ItemAnswer
Largest tiger reserve (core habitat)Nagarjunasagar–SrisailamQ
NDA 2018 — largest by core/critical tiger habitat area.
World Network Biosphere ReservesGulf of Mannar, Nokrek, Panchmarhi, SimlipalQ
NDA 2017 — the set included in UNESCO's World Network.
Sanctuaries south→northBhadra → Simlipal → Pachmarhi → Shikari DeviQ
Indian States and Islands

Reference tables (2)

State borders, size and economy facts3 rows
FactValue
Assam's borders2 countries (Bhutan, Bangladesh), 7 Indian statesQ
NDA 2025 NDA-2 keyed this as '3 countries, 7 states' (option C). Geographically Assam borders only 2 countries — it does NOT touch China (that is Arunachal). Treat the official answer as a paper quirk; the correct count is 2.
FALSE statement trap'MP is the 4th largest state' is wrongQ
NDA 2023 — Madhya Pradesh is NOT the fourth largest by area (it is the second).
Hornbill festivalNagaland
Andaman & Nicobar, Lakshadweep and coral reefs3 rows
FactDetail
Major coral-reef areasGulf of Kachchh, Gulf of Mannar, Lakshadweep, A&N IslandsQ
NDA 2017 — all four (1, 2, 3 and 4) are major coral-reef areas.
A&N false-statement trap'Max rainfall March–April' is WRONGQ
NDA 2024 — A&N rainfall is monsoon-driven, NOT March–April.
10° ChannelSeparates Andaman from Nicobar (~150 km)

Watch out for (3)