Q41. Oxbow lakes are most commonly formed as a result of:
Major Rivers and Lakes of the World: RAS Prelims MCQs
80 RAS Prelims MCQs on the major rivers and lakes of the world cover the longest rivers, tributaries, deltas, lake basins and river features. The Amazon and its tributaries, the Congo at the Equator, the Volga and the Caspian, the Mississippi delta and the Aral Sea are tested, and the explanations link each river to its basin and mouth.
Practice questions based on the RPSC RAS Prelims syllabus. They follow the exam pattern but are not past-paper questions.
Showing 41–50 of 80 questions
Q42. Arrange the following Great Lakes of North America in order from West to East:
I. Lake Erie
II. Lake Superior
III. Lake Huron
IV. Lake Ontario
Select the correct sequence:
I. Lake Erie
II. Lake Superior
III. Lake Huron
IV. Lake Ontario
Select the correct sequence:
Explanation
The Great Lakes are arranged across the interior of North America in a specific longitudinal sequence. Moving from west to east, the order begins with Lake Superior, the largest and westernmost. It is followed by Lake Michigan and Lake Huron. Further east are Lake Erie and finally Lake Ontario, which connects to the Atlantic Ocean via the St. Lawrence.
Q43. Which of the following statements correctly identifies the nations that border the Aral Sea?
Explanation
The Aral Sea is located in Central Asia and was once one of the largest lakes in the world. Its geographic position is defined by the borders of two specific countries: Kazakhstan to the north and Uzbekistan to the south. The dramatic reduction of the lake’s surface area over recent decades has affected the environment and economies of both nations.
Q44. The Lena River, one of the three great Siberian rivers, primarily flows through which country?
Explanation
The Lena River is one of the three great Siberian rivers that flow into the Arctic Ocean. It is located entirely within the borders of Russia, originating in the Baikal Mountains and traversing the vast territory of eastern Siberia. The river is notable for its massive delta and its role as a vital transportation artery during the summer months.
Q45. Match List-I (African Lake) with List-II (Specific Characteristic) and select the correct option:
| African Lake | Specific Characteristic |
|---|---|
| A. Lake Victoria | i. Located in a large, shallow endorheic basin bordering the Sahara |
| B. Lake Tanganyika | ii. Source of the White Nile, not a typical rift valley lake |
| C. Lake Malawi | iii. Southernmost of the East African Rift lakes |
| D. Lake Chad | iv. Longest freshwater lake in the world, exceptionally deep |
Explanation
African lakes possess distinct physical and geological characteristics. Lake Victoria is a shallow basin serving as the source of the White Nile. Lake Tanganyika is exceptionally deep and holds the record for the world’s longest freshwater lake. Lake Malawi is the southernmost of the rift lakes. Lake Chad is a shallow, endorheic body of water situated near the Sahara.
Q46. The heavy sediment load of the Huang He (Yellow River) results in which significant geographical consequence?
Explanation
The Huang He carries an immense volume of sediment, leading to significant geological and human impacts. As the river reaches the low-lying North China Plain, the flow velocity decreases, causing the silt to settle and accumulate. This process steadily raises the riverbed above the surrounding land, necessitating high levees and often resulting in catastrophic breach-induced flooding.
Q47. Glacial lakes, such as the Great Lakes of North America, are primarily formed by:
Explanation
Glacial lakes are formed through the powerful erosive action of massive ice sheets. During glacial periods, moving ice scours the land surface, creating deep depressions and hollows in the bedrock. When the glaciers eventually retreat and melt due to climatic warming, these basins fill with meltwater, forming large freshwater bodies like the Great Lakes of North America.
Q48. Consider the following statements about the Mississippi-Missouri river system:
I. It forms the largest drainage basin entirely located within North America.
II. The Missouri River is technically the longest single river within this system.
III. The system flows predominantly westward and empties into the Pacific Ocean.
Which of the above statement(s) is/are correct?
I. It forms the largest drainage basin entirely located within North America.
II. The Missouri River is technically the longest single river within this system.
III. The system flows predominantly westward and empties into the Pacific Ocean.
Which of the above statement(s) is/are correct?
Explanation
The Mississippi-Missouri river system is the primary drainage network for North America. While the Mississippi is the main stem, the Missouri River is technically the longer tributary within the combined system. This massive network collects water from a vast interior basin. It flows predominantly in a southward direction before discharging its waters into the Gulf of Mexico.
Q49. Identify the incorrect statement regarding the major European rivers.
Explanation
Major European rivers are essential for international trade and connectivity. The Danube is notable for flowing through or bordering numerous countries. The Thames is the iconic river of London. The Rhine serves as a vital industrial artery. However, the Volga River, the longest in Europe, does not drain into the Black Sea; it empties into the landlocked Caspian Sea.
Q50. The following question consists of two statements -- Assertion (A) and Reason (R). Answer the question by selecting the appropriate option:
Assertion (A): The Amazon River holds the highest discharge volume of any river in the world.
Reason (R): The Amazon drainage basin is located within the equatorial region, which experiences heavy rainfall throughout the year.
Choose the correct option:
Assertion (A): The Amazon River holds the highest discharge volume of any river in the world.
Reason (R): The Amazon drainage basin is located within the equatorial region, which experiences heavy rainfall throughout the year.
Choose the correct option:
Explanation
The Amazon River is unparalleled in terms of its total discharge volume, carrying more water than the next several largest rivers combined. This immense flow is directly explained by its geographical location. The river’s vast drainage basin lies within the equatorial belt, a region characterized by consistent, heavy precipitation throughout the year, ensuring a massive and continuous supply of water.Answer key for these questions
| Q | Correct answer |
|---|---|
| 41 | (c) Meandering and subsequent cut-offs in lower courses |
| 42 | (a) II - III - I - IV |
| 43 | (d) Kazakhstan and Uzbekistan |
| 44 | (b) Russia |
| 45 | (c) A-ii, B-iv, C-iii, D-i |
| 46 | (d) Frequent flooding caused by rising riverbeds |
| 47 | (a) Moving ice sheets scouring basins then melting |
| 48 | (a) I and II only |
| 49 | (b) The Volga River drains into the Black Sea, making it critical for Mediterranean shipping. |
| 50 | (a) Both A and R are true and R is the correct explanation of A. |
Key facts from Major Rivers and Lakes of the World
- By the usual measurements the longest rivers run in the order Nile, Amazon, Yangtze, Mississippi-Missouri.
- The Rio Negro is a major left-bank tributary of the Amazon.
- The Congo River crosses the Equator twice.
- The Volga, the longest river of Europe, drains into the Caspian Sea; the Thames passes through London.
- The Mississippi forms a bird’s-foot delta; the Huang He carries yellow silt from the Loess Plateau.
- The Aral Sea has shrunk mainly because rivers were diverted for large-scale irrigation; Lake Tanganyika is the second deepest lake in the world.
Frequently asked questions
How many RAS Prelims practice MCQs are there on Major Rivers and Lakes of the World?
This page has 80 practice MCQs on Major Rivers and Lakes of the World (World Geography). Each has the correct answer, and most have an explanation.
Which river crosses the Equator twice?
The Congo River in Africa. It flows through both hemispheres, which gives its basin rainfall in all seasons and makes it a river with a very steady flow.
Why has the Aral Sea shrunk?
Because the rivers that fed it, the Amu Darya and Syr Darya, were diverted for large-scale irrigation of cotton and other crops. With little inflow, the lake lost most of its area and became a major environmental disaster.
Where does the Volga drain?
Into the Caspian Sea. The Volga is the longest river in Europe, and because the Caspian is an inland sea, the river is an example of inland drainage.