Mountains and Plateaus of India

Correct answer: A. It affects Indian climate by blocking cold Central Asian winds

The governing concept is the climatic role of the Himalayas as a major northern barrier. Their high, continuous ranges obstruct extremely cold continental winds from Central Asia during winter, helping northern India avoid the full severity of that cold air. They also influence the monsoon by preventing moisture-bearing winds from moving freely northward and by encouraging uplift and rainfall along suitable slopes. Therefore, option A correctly describes the barrier effect. Option B concerns the volcanic origin and weathering associated with Deccan basalt, while options C and D describe no accepted geographical process. The effect is not that the Himalayas control every feature of Indian climate, but that their position and elevation are crucial influences.

Correct answer: A. The Western Ghats form a steep mountain edge near the western margin of the Deccan Plateau

The governing concept is the relationship between a plateau and the escarpment or highland bordering it. The Deccan Plateau occupies much of peninsular India, while the Western Ghats run along its western margin, broadly parallel to the Arabian Sea coast. In many sections they form a pronounced, steep-sided edge or escarpment, making option A correct from a relief perspective. Option B incorrectly places the Western Ghats in the northern alluvial plain. Option C reverses the position of the Deccan and the Himalayas, because the Deccan is south of the Himalayan system. Option D wrongly identifies a vast basaltic plateau as a coral island.

Correct answer: A. Ladakh Plateau

The governing concept is the physical geography of the Trans-Himalayan highlands. The Ladakh Plateau lies at a very high elevation north of the main Himalayan ranges and receives little precipitation because surrounding mountains create a rain-shadow effect. Its sparse vegetation, low moisture and severe winter temperatures give it the characteristics of a cold desert. Therefore option A, the Ladakh Plateau, matches all three clues: high elevation, Trans-Himalayan location and cold-arid conditions. The Meghalaya Plateau is a humid northeastern plateau, Malwa is a central Indian lava-related plateau, and the Karnataka Plateau is a peninsular upland with a warmer tropical setting. None of these alternatives fits the complete clue set.

Correct answer: A. Deccan Plateau

The governing concept is the link between parent rock, soil formation and regional agriculture. Much of the Deccan Plateau is underlain by basaltic lava flows associated with the Deccan Traps. Weathering of this basalt, together with local climatic conditions, has produced extensive black or regur soil. This soil retains moisture and is especially suitable for cotton, so the combined clues point clearly to option A, the Deccan Plateau. The Khasi Hills are a northeastern hill system, Himadri is the highest Himalayan range, and the Aravalli is an ancient mountain system. None of those alternatives is identified by the specific basalt–black soil–cotton association.

Correct answer: A. Khasi Hills

The governing concept is orographic rainfall in the hills of Meghalaya. Cherrapunji and Mawsynram are located in or near the Khasi Hills, where moisture-laden winds from the Bay of Bengal are forced to rise against the steep southern escarpment. As the air rises, it cools, condensation increases and very heavy rainfall occurs. Therefore option A, the Khasi Hills, correctly matches all the clues. The Palani Hills are in southern India, the Aravalli is an old range in western India, and the Maikal Hills are part of the central Indian highlands. These alternatives do not explain the famous concentration of extreme monsoon rainfall in the Meghalaya region.

Correct answer: A. Being the highest main Himalayan range

The governing concept is the relationship between altitude, temperature, and permanent snow. Himadri, also called the Great Himalaya, is the highest and most continuous Himalayan range. Its peaks commonly rise above the permanent snowline, where very low temperatures allow snow to remain and accumulate over long periods. This accumulation feeds glaciers, which later supply important Himalayan rivers. Therefore, option A correctly identifies the physical basis: Himadri is the highest main Himalayan range. Option B refers to the Deccan Plateau, while options C and D describe landforms unrelated to the high, snow-covered Himalayan environment. The key exam link is: highest range, permanent snow, glaciers, and high peaks.

Correct answer: A. Doon valleys occur between Shiwalik and Middle Himalaya

The governing concept is the parallel arrangement of the Himalayan ranges. From south to north, the outer Shiwalik range is followed by the Lesser or Middle Himalaya, and elongated longitudinal valleys occur in the intervening zone. These valleys are called Doons or Duns. Dehradun is the best-known example, although other valleys such as Kotli Dun and Patli Dun are also associated with this setting. Thus option A is correct because it places Doon valleys between the Shiwalik and the Middle Himalaya. The Deccan Trap is a volcanic plateau, the Eastern Ghats are a separate hill system, and Ladakh is a high Trans-Himalayan region; none explains the location of Doons.

Correct answer: A. Iron ore, coal, and other minerals

The governing concept is industrial location based on raw-material availability. Iron and steel plants require large quantities of iron ore, coking coal, limestone, manganese, water, power, and transport. The Chota Nagpur Plateau is close to important deposits of iron ore and coal and also contains other minerals needed by heavy industry. Locating production near bulky raw materials reduces transport cost and supports related industries, so option A gives the correct combination. Options B and D describe coastal or marine environments and do not explain the plateau’s metallurgical base. Option C belongs to cold high mountain regions and is unrelated to iron-and-steel industrial concentration. Hence the plateau is properly understood as a mineral-rich industrial region.

Correct answer: A. It is linked with the meeting region of Eastern and Western Ghats

The governing concept is the structure and regional arrangement of the Peninsular mountain systems. The Western Ghats run along the western edge of the Deccan Plateau, while the Eastern Ghats are discontinuous hills along the eastern side. In southern India, the Nilgiri Hills form an important highland connection between these two systems, which is why they are described as a junction of the Eastern and Western Ghats. Option A therefore gives the correct geographical basis. The Himalaya is a separate young fold mountain system, the Aravalli is an ancient range in northwestern India, and the Ganga Delta is a depositional lowland. None of those alternatives explains the Nilgiri junction.

Correct answer: A. It is an ancient range that has undergone long erosion

The governing concept is the relation between geological age, uplift, and erosion. The Aravalli Range is one of the oldest fold mountain systems in the Indian subcontinent. It has experienced geological weathering and erosion for a very long time, so its relief is generally lower, more discontinuous, and more rounded than that of young mountains such as the Himalaya. Option A correctly draws this conclusion from its old and eroded appearance. Option B reverses the age relationship because the Himalaya is geologically younger and still tectonically active. Option C is wrong because Aravalli is not made entirely of glacial material, and option D describes coral islands, a marine biological landform unrelated to this ancient continental range.

Correct answer: A. They are linked with high dry mountain regions beyond the Himalayas

The governing concept is the regional classification of mountain ranges according to their position relative to the main Himalaya. The Trans-Himalaya lies north of or beyond the main Himalayan ranges and includes high, rugged, generally cold and dry mountain systems such as the Karakoram, Ladakh, and Zanskar. Their rain-shadow setting and great elevation help explain the sparse vegetation and arid landscapes found in much of the region. Option A is correct because it identifies both their location beyond the main Himalaya and their high, dry character. Options B, C, and D refer respectively to coastal depositional landforms, a soil type of the Deccan, and a different mountain system in peninsular India.

Correct answer: A. An important low natural passage

The governing concept is the continuity and interruption of a mountain barrier. The Western Ghats are generally a fairly continuous elevated escarpment along the western margin of peninsular India, but the Palghat Gap is a broad, relatively low natural opening in this highland system. It lies between the Nilgiri Hills and the Anaimalai Hills and provides an important route between Kerala and Tamil Nadu. Because it is a passage through an otherwise continuous mountain wall, option A is correct. It is not a glacier, which is a mass of moving ice found in cold highlands; it is not an Aravalli peak; and it is not an eastern coastal delta formed by river deposition.

Correct answer: A. It is counted among the highest peaks of South India

The governing concept is the identification of regional high points within the Peninsular mountain system. Anamudi, located in Kerala in the southern Western Ghats, rises to about 2,695 metres and is widely recognized as the highest peak in South India and the highest point of the Western Ghats. Its elevation and position in the Anaimalai Hills explain why it is treated as a major southern peak. Therefore option A is correct. The Ganga Plain is a low alluvial region, not Anamudi’s location. Aravalli is a separate ancient range, and Purvanchal refers to northeastern extensions of the Himalaya; neither describes Anamudi. The useful memory link is Anamudi—Kerala—Western Ghats—highest peak of South India.

Correct answer: A. Kanchenjunga is linked with Sikkim-Eastern Himalaya

The governing concept is the regional identification of Himalayan peaks. Kanchenjunga is located in the Sikkim sector of the Eastern Himalaya, near the Nepal–India border, and is one of the highest peaks in the world. Nanda Devi is associated with Uttarakhand in the Garhwal Himalaya. Thus option A provides the correct distinguishing basis: Kanchenjunga belongs to the Sikkim–Eastern Himalayan setting, whereas Nanda Devi belongs to Uttarakhand’s Himalayan region. The Deccan Plateau is a peninsular upland, the Aravalli is an ancient range in western India, and the Eastern Ghats are coastal peninsular hills. None of these three alternatives is the location of Kanchenjunga.

Correct answer: A. Long-term erosion

The governing concept is denudation, especially the long-term erosion of exposed hard rocks. The Bundelkhand Plateau contains ancient crystalline rocks and has a rugged, dissected, and weathered surface shaped over long geological periods. Therefore, option A, long-term erosion, best explains the visible relief. Coral deposition occurs in warm shallow marine settings, not on this inland plateau. Glacial deposition is associated mainly with areas affected by glaciers, whereas sea tides act along coasts. Weathering and running water may contribute locally, but among the given choices the broad and correct process is prolonged erosion.

Correct answer: A. Relation with sources of Narmada and Son

The governing concept is a watershed or water divide: a highland from which streams flow toward different drainage basins. Amarkantak is an important highland and source region in central India. The Narmada rises near Amarkantak and flows westward, while the Son rises in the same broader highland region and joins the Ganga drainage system eastward. This opposing drainage relationship explains option A. The mouth of the Ganga is a deltaic outlet, not an upland source; the Luni’s sandy areas are in western Rajasthan; and marine coral has no connection with Amarkantak’s watershed function.

Correct answer: A. They are Satpura-related subranges of Central India

The governing concept is the internal structure of a mountain system, in which a major range may include associated hills, highlands, and subranges. Maikal and Mahadeo are recognized as important hill or subrange units connected with the Satpura system of central India. Therefore, option A is correct. They are not deltas, because deltas form from river deposition at coasts or lake margins. They are not Himalayan glaciers, which are permanent ice masses at high elevations, and they are not coral islands, which develop in warm shallow seas. Their significance is regional and physiographic, not coastal or glacial.

Correct answer: A. They are north-eastern hill units of Purvanchal

The governing concept is the classification of India’s north-eastern hill ranges. Purvanchal refers to the group of hills forming the eastern extension of the Himalayan system around north-eastern India. The Patkai, Naga, and Mizo Hills are important hill units within this broad regional group. Therefore, option A is correct. They are not lava layers of the Deccan Plateau, dunes related to the Aravalli region, or alluvial plains of the Ganga. Their curved, hill-dominated setting in the north-east and their connection with the eastern Himalayan continuation provide the location clue required by the question.

Correct answer: A. Dryness increases due to altitude and mountain barriers

The governing concept is the rain-shadow effect combined with high-altitude conditions. Moisture-bearing monsoon winds lose much of their water while crossing or rising over major mountain barriers. Ladakh lies on the leeward side of the Himalayas and receives very little precipitation. Its great elevation also produces low temperatures, so the region is known as a cold desert. Therefore, option A is correct. Increased marine humidity would encourage rainfall rather than dryness, while coral reefs and the Ganga Delta are coastal or fluvial features unrelated to Ladakh’s high, enclosed plateau environment.

Correct answer: A. Nilgiri Hills

The correct answer is the Nilgiri Hills. Ooty is a well-known hill station in the Nilgiris, Doddabetta is the highest peak of the Nilgiri group, and Mukurthi is another important highland area in the same region. The Nilgiris lie in southern India near the meeting zone of the Western Ghats and the Eastern Ghats, although they are generally studied with the Western Ghats. Naga Hills belong to the northeastern hill system, Mishmi Hills are in the far northeast, and Rajmahal Hills are in eastern India. Therefore, the common geographical association of all three names is the Nilgiri Hills.

Correct answer: A. Hill units of Southern Western Ghats

The correct answer is the hill units of the Southern Western Ghats. The Palani Hills, Annamalai Hills, and Cardamom Hills occur in the elevated highland belt of southern peninsular India and are commonly studied as subdivisions or associated ranges of the Western Ghats. Their relief, heavy rainfall, forests, and plantation regions reflect the geography of this mountain system. The outer Himalaya is far to the north, the Ganga delta is a low alluvial depositional plain, and the Thar consists mainly of arid sandy terrain. Since all three named hills belong to the southern highland chain, option A gives the only coherent regional conclusion.

Correct answer: A. They are places of the Western Ghats region of Maharashtra

Option A is correct because Sahyadri is the traditional Indian name for the Western Ghats, especially the prominent escarpment along western Maharashtra. Mahabaleshwar is a highland source region, while Lonavala and Khandala are hill stations situated on or beside this mountain barrier. The Western Ghats rise sharply from the Konkan coast and influence rainfall, drainage, and local relief. Sikkim belongs to the Himalayan system, the Aravallis are an older range of northwestern India, and Assam’s river islands are depositional features rather than mountain sites. Thus their location in Maharashtra’s Western Ghats is the basis for associating all three with Sahyadri.

Correct answer: A. Western Ghats region of Karnataka

The correct answer is the Western Ghats region of Karnataka. Baba Budan Hills, Kodagu or Coorg, and Kudremukh are all associated with Karnataka’s elevated western and southwestern landscape. This region receives substantial orographic rainfall, supports evergreen and moist forests, and includes important coffee-growing and biodiversity areas. Kudremukh is also known for its mountainous terrain and iron-ore history. The Aravalli region lies mainly in northwestern India, the Barail Hills are in the northeastern hill system, and the Ganga Plain of Bihar is a low alluvial plain. Their shared location clue therefore points clearly to Karnataka’s Western Ghats.

Correct answer: A. Eastern Ghats

The correct answer is the Eastern Ghats. Mahendragiri in Odisha and the Shevaroy and Javadi Hills in Tamil Nadu are separated hill blocks belonging to the discontinuous Eastern Ghats system. Unlike a continuous wall, the Eastern Ghats are interrupted by major rivers such as the Mahanadi, Godavari, Krishna, and Kaveri, which have cut across the old hills. The Western Ghats form a more continuous escarpment along the western edge of the Deccan, while the Aravalli and Karakoram are different mountain systems in other parts of India. The named examples therefore identify the Eastern Ghats.

Correct answer: A. They are linked with plateau and mineral regions of eastern India

Option A is correct. The Rajmahal Hills and Singhbhum Plateau are parts of the old, elevated terrain of eastern India, especially the broader Chota Nagpur and adjoining plateau setting. This region is built largely of ancient crystalline and volcanic rocks and is noted for important mineral resources, including coal, iron ore, copper, and bauxite in different sectors. The term mineral-plateau therefore refers to both its hard-rock geological foundation and its economic resources. Coastal marshes, Himalayan glaciers, and coral islands have entirely different origins, relief, and locations, so none of those alternatives explains the two named landforms.