The Himalayan Rivers

Correct answer: A. Ganga river system

The Ghaghara rises in the Himalayas and joins the Ganga in India as one of its major tributaries; therefore, it belongs to the Ganga river system. The Yamuna is also a tributary of the Ganga, but the Ghaghara is not part of the Yamuna system. Exam tip: Remember Ghaghara, Gandak and Kosi as major Himalayan tributaries of the Ganga.

Correct answer: A. Indus river system

Satluj is a major tributary of the Indus river system. Exam tip: connect Punjab rivers with the Indus system.

Correct answer: A. Indus river system

Ravi and Beas are rivers of the Indus system. Exam tip: place them in the north western river system.

Correct answer: A. Indus

Jhelum and Chenab are tributaries of the Indus system. Exam tip: remember their names with the Indus system.

Correct answer: A. In irrigation and drinking water

The water of these rivers is useful for farming and daily needs. Exam tip: remember the economic importance of rivers.

Correct answer: A. Due to availability of water and fertile land

River valleys attract settlement due to water and fertile soil. Exam tip: write resources as the reason for settlement.

Correct answer: A. Due to fast flow and slope in the upper course

Fast flow and slope are useful for power generation. Exam tip: connect mountain rivers with hydroelectricity.

Correct answer: A. They rise in high mountains and pass through vast plains

Himalayan rivers travel long distances from source to mouth. Exam tip: connect length with source and plains.

Correct answer: A. It separates two river basins

The direct answer is A, it separates two river basins. A water divide is a raised area such as a ridge, hill, or mountain range. Rain falling on one side flows into one drainage basin, while rain falling on the other side flows into another basin. Thus, the divide marks the boundary between areas drained by different rivers or river systems. Option A is correct. Option B, turning a river into the sea, is impossible; a river may flow into a sea, but a divide does not transform it. Option C, drinking river water, is a humorous but geographically meaningless statement. Option D, turning a delta into a mountain, is also incorrect because a delta is built by deposition near a river mouth, not by a water divide. In Himalayan geography, high ridges can separate the drainage systems of major rivers. Memory cue: divide the rainfall, divide the basins.

Correct answer: A. The area whose water drains into a river system

A river basin includes the area drained by the main river and tributaries. Exam tip: remember basin as drained area.

Correct answer: A. From erosion of mountain rocks

Sediment means loose material such as pieces of rock, gravel, sand and silt. Himalayan rivers flow through young, high mountains where slopes are steep and rocks are exposed. Running water, weathering, landslides and other forms of erosion break and remove rock material. The river then carries these particles downstream. Thus, the sediments in Himalayan rivers mainly originate from the erosion of mountain rocks and surrounding slopes.

Option A is correct. Sea ships do not supply the natural sediment load of a river, and material does not come directly from the sky. City lights have no physical role in producing river sediment. In the upper course, strong slope and swift flow help the river remove material; farther downstream, some of that material may be deposited when the river loses energy. The essential geographical connection is erosion in the mountains followed by transportation of sediment by the river.

Correct answer: A. Because speed and energy decrease

In the lower course river speed decreases so materials are deposited. Exam tip: connect reduced speed with deposition.

Correct answer: A. The river bed may rise

Silt deposition may raise the river bed and increase flood risk. Exam tip: connect silt with floods.

Correct answer: A. Ganga

Hugli is an important distributary of the Ganga. Exam tip: connect distributary with the mouth region of a river.

Correct answer: A. A branch flowing away from the main river

A distributary flows away from the main channel especially in a delta. Exam tip: know the difference between tributary and distributary.

Correct answer: A. A river that joins a main river

The direct answer is A: a tributary is a river that joins a main river. A river system usually has one larger main river and many smaller streams or rivers. These smaller rivers flow into the main river and add their water to it; therefore, the exact reasoning is that a tributary is identified by where it flows and not by its size, colour, source, or appearance. Option A is correct because it describes this joining relationship. Option B is wrong because a sea wave is a movement of seawater, not a river joining another river. Option C is wrong because a dry channel may carry no water, but it is not necessarily a tributary. Option D is wrong because a wall of ice is not a river; it may describe an ice formation. A useful exam cue is: tributary means a smaller river that feeds a larger river. Do not confuse it with a distributary, which flows away from the main river, often near a delta.

Correct answer: A. Providing irrigation water and fertile soil

Himalayan rivers support agriculture in two major ways. They carry water that can be used for irrigation, especially when rainfall is seasonal or uneven. They also transport fine sediments and deposit them on plains, forming fertile alluvial soils. These soils are often suitable for growing crops because repeated deposition can replenish nutrients and create broad level fields. The actual benefit varies with flooding, management, and local soil conditions.

The correct choice is A, providing irrigation water and fertile soil. The other choices describe impossible or harmful transformations and do not represent an agricultural benefit. The best answer includes both water and alluvium: water helps crops grow during dry periods, while deposited silt improves the soil for cultivation. Thus, Himalayan rivers are important not only as channels of water but also as agents that shape productive plains.

Correct answer: A. North western

The Indus system is linked with the north western part of India. Exam tip: remember Indus with the north west.

Correct answer: A. From the eastern Himalayan region

The Brahmaputra enters India through the eastern Himalayan region. Exam tip: connect Brahmaputra with the north east.

Correct answer: A. They are mostly perennial and long

Himalayan rivers form long courses with water from glaciers and rainfall. Exam tip: use source and length for comparison.

Correct answer: A. Indus Ganga and Brahmaputra

Indus Ganga and Brahmaputra are the major Himalayan river systems of India. Exam tip: remember these three as the base group.

Correct answer: B. Assam plain

In Assam the water and silt of the Brahmaputra can increase flood problems. Exam tip: connect Brahmaputra with Assam floods.

Correct answer: C. Support in farming and irrigation

Himalayan rivers support farming by providing water and fertile soil. Exam tip: connect river plains with agriculture.

Correct answer: D. A large river system

Tributaries add water to the main river and make the river system larger. Exam tip: understand a river system through the main river and tributaries.

Correct answer: A. They receive water from both glaciers and rainfall

The perennial nature of Himalayan rivers is linked with both glaciers and rainfall. Exam tip: treat their water source as the main identity.