Q11. Which distinctive geographical feature is formed at the mouth of the Mississippi River system?
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 11–20 of 80 questions
Q12. Consider the following statements regarding the Siberian river systems:
I. The Ob, Yenisei, and Lena all flow predominantly northwards.
II. They discharge their waters into the Arctic Ocean.
III. Their lower reaches freeze in winter, leading to severe spring flooding when the upper reaches thaw.
IV. They are characterized by warm waters supporting tropical biodiversity.
Which of the above statement(s) is/are correct?
I. The Ob, Yenisei, and Lena all flow predominantly northwards.
II. They discharge their waters into the Arctic Ocean.
III. Their lower reaches freeze in winter, leading to severe spring flooding when the upper reaches thaw.
IV. They are characterized by warm waters supporting tropical biodiversity.
Which of the above statement(s) is/are correct?
Explanation
The major Siberian rivers, including the Ob, Yenisei, and Lena, primarily flow in a northward direction. These systems discharge their waters into the Arctic Ocean. A significant geographical challenge occurs during spring when the upper southern reaches thaw while the lower northern reaches remain frozen. This blockage leads to severe ice-jam flooding across the vast Siberian plains.
Q13. Identify the odd one out among the following rivers based on their primary geographical continent.
Explanation
Geographical classification of river systems often groups them by the continent where they are located. The Rhine, Danube, and Thames are all major rivers situated within the European continent. In contrast, the Amazon River is located in South America. Therefore, the Amazon is the exception in this list, which primarily consists of significant European waterways used for trade.
Q14. Among the African Great Lakes, which lake holds the distinction of being the second deepest in the world after Lake Baikal?
Explanation
Lake Tanganyika is a major African Great Lake located within the East African Rift. It holds several global records, including being the longest freshwater lake in the world. Geologically, it is the second deepest lake globally, surpassed only by Lake Baikal in Siberia. Its great depth is a result of the tectonic forces that created the rift valley.
Q15. Match List-I (Type of Lake) with List-II (Example) and select the correct option:
| Type of Lake | Example |
|---|---|
| A. Tectonic Lake | i. Crater Lake |
| B. Volcanic (Caldera) Lake | ii. Lake Superior |
| C. Glacial Lake | iii. Caspian Sea |
| D. Oxbow Lake | iv. Kanwar Lake |
Explanation
Lakes are classified based on their formation processes. Tectonic lakes, like the Caspian Sea, originate from crustal movements. Volcanic lakes, such as Crater Lake, form in calderas. Glacial lakes, including Lake Superior, result from ice sheet scouring. Oxbow lakes, like Kanwar Lake, are formed by river meandering. These diverse origins dictate the shape, depth, and chemistry of global lakes.
Q16. Which of the following countries does NOT share a coastline with the Caspian Sea?
Explanation
The Caspian Sea is the world’s largest inland body of water and is bordered by five specific countries. These nations include Russia to the northwest, Kazakhstan to the northeast, Turkmenistan to the southeast, Iran to the south, and Azerbaijan to the southwest. Uzbekistan, while located in Central Asia, is landlocked and does not share a coastline with the Caspian Sea.
Q17. Which of the following pairs of River and its Outfall is correctly matched?
Explanation
Correct identification of river outfalls is essential in physical geography. The Danube River drains into the Black Sea, not the Red Sea. The Rhine River flows into the North Sea, while the Lena River empties into the Arctic Ocean. The Thames River, which flows through London, correctly discharges its waters into the North Sea via the Thames Estuary.
Q18. Consider the following statements regarding the Great Lakes of North America:
I. Lake Superior is the largest freshwater lake in the world by surface area.
II. Lake Michigan is located entirely within the United States.
III. Lake Erie is connected to Lake Ontario by the Niagara River.
IV. All five Great Lakes share a direct border with Canada.
V. They were primarily formed by glacial action during the Pleistocene epoch.
Which of the above statement(s) is/are correct?
I. Lake Superior is the largest freshwater lake in the world by surface area.
II. Lake Michigan is located entirely within the United States.
III. Lake Erie is connected to Lake Ontario by the Niagara River.
IV. All five Great Lakes share a direct border with Canada.
V. They were primarily formed by glacial action during the Pleistocene epoch.
Which of the above statement(s) is/are correct?
Explanation
The North American Great Lakes are massive freshwater bodies formed primarily by glacial action during the Pleistocene epoch. Lake Superior is the largest by surface area globally. Lake Michigan is the only one situated entirely within the United States. While most share a border with Canada, Michigan does not. Lake Erie connects to Lake Ontario through the Niagara River.
Q19. Read the following statements regarding the classification of rivers and select the correct option:
Statement I: A consequent river initiates its flow according to the general slope of a newly uplifted land surface.
Statement II: A subsequent river generally flows parallel to the regional strike of the underlying rock layers, often developing along zones of weaker rock.
Which of the following is correct?
Statement I: A consequent river initiates its flow according to the general slope of a newly uplifted land surface.
Statement II: A subsequent river generally flows parallel to the regional strike of the underlying rock layers, often developing along zones of weaker rock.
Which of the following is correct?
Explanation
River classification is based on the relationship between flow and geological structure. A consequent river develops its course by following the initial slope of a newly formed land surface. A subsequent river is a tributary that develops later, typically flowing along the strike of the underlying rock strata or following zones of weaker rock that are easily eroded by water.
Q20. The River Thames, a major river of historical importance in Europe, passes through which globally significant capital city?
Explanation
The River Thames is the most famous waterway in the United Kingdom and plays a central role in the nation’s geography and history. It flows through southern England and passes directly through the capital city, London. The river is tidal in its lower reaches and has historically served as a critical route for international trade and domestic transport.Answer key for these questions
| Q | Correct answer |
|---|---|
| 11 | (d) A classic bird’s-foot delta |
| 12 | (c) I, II, and III only |
| 13 | (c) Amazon |
| 14 | (d) Lake Tanganyika |
| 15 | (a) A-iii, B-i, C-ii, D-iv |
| 16 | (b) Uzbekistan |
| 17 | (b) Thames River - North Sea |
| 18 | (b) I, II, III, and V |
| 19 | (a) Both Statement I and Statement II are correct. |
| 20 | (d) London |
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.