Q71. Identify the odd one out among the following natural geographical features based on their primary formational processes.
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 71–80 of 80 questions
Q72. Consider the following statements about the Volga River:
I. It originates in the Valdai Hills of Russia.
II. It is the longest river entirely within the European continent.
III. It freezes during the winter over most of its length.
IV. It flows heavily through the industrial heartland of Germany.
Which of the above statement(s) is/are incorrect?
I. It originates in the Valdai Hills of Russia.
II. It is the longest river entirely within the European continent.
III. It freezes during the winter over most of its length.
IV. It flows heavily through the industrial heartland of Germany.
Which of the above statement(s) is/are incorrect?
Explanation
The Volga is a legendary river that originates in the Valdai Hills and is the longest river in Europe. It flows entirely within Russia and is a central part of the nation’s identity and economy. While it does freeze during the winter months, it does not flow through Germany; it traverses the Russian heartland before emptying into the Caspian Sea.
Q73. Which feature uniquely highlights the historical importance of the Nile River in antiquity?
Explanation
The historical significance of the Nile River is deeply tied to the development of ancient Egyptian civilization. Each year, the river would overflow its banks, depositing a layer of rich, fertile silt across the surrounding floodplains. This natural irrigation and fertilization cycle allowed for productive agriculture in an otherwise arid region, providing the economic foundation for one of history’s greatest empires.
Q74. Arrange the major Siberian rivers from West to East:
I. Yenisei
II. Ob
III. Lena
Select the correct sequence:
I. Yenisei
II. Ob
III. Lena
Select the correct sequence:
Explanation
The three great rivers of Siberia are distributed across the vast northern territory of Russia. When moving from west to east, the sequence begins with the Ob River, followed by the Yenisei River in the central region. The Lena River is the easternmost of the three. All three rivers flow predominantly northward to discharge their waters into the Arctic Ocean.
Q75. Match List-I (Specific River) with List-II (Key Identifying Feature) and select the correct option:
| Specific River | Key Identifying Feature |
|---|---|
| A. Mississippi | i. Largest tropical rainforest basin |
| B. Nile | ii. Bird’s foot delta |
| C. Amazon | iii. High loess sediment content |
| D. Huang He | iv. Longest river in the world |
Explanation
Major rivers are often identified by unique geographical or ecological traits. The Mississippi River is characterized by its bird’s-foot delta. The Nile is globally recognized as the longest river. The Amazon River basin contains the world’s largest tropical rainforest, known for its biodiversity. The Huang He, or Yellow River, is famous for the high loess sediment content that colors its waters.
Q76. Which of the following prominent African lakes is generally NOT considered a physical part of the Great Rift Valley system due to its shallow, saucer-like depression?
Explanation
While many African Great Lakes are situated directly within the deep, narrow trenches of the East African Rift Valley, Lake Victoria has a different origin. It occupies a wide, shallow, and saucer-shaped tectonic depression located between the Eastern and Western Rift branches. Because of this, it lacks the extreme depth and steep walls characteristic of true rift valley lakes.
Q77. Read the following statements regarding the Amazon River basin and select the correct option:
Statement I: The vast equatorial rainforest occupying the Amazon basin is locally referred to as the Selvas.
Statement II: The Amazon basin consistently experiences distinct, prolonged dry seasons causing the river to drastically shrink for half the year.
Which of the following is correct?
Statement I: The vast equatorial rainforest occupying the Amazon basin is locally referred to as the Selvas.
Statement II: The Amazon basin consistently experiences distinct, prolonged dry seasons causing the river to drastically shrink for half the year.
Which of the following is correct?
Explanation
The Amazon River basin is dominated by the world’s largest tropical rainforest, which is locally known as the Selvas. This region is located along the Equator and is characterized by high temperatures and significant rainfall throughout the year. Contrary to having a prolonged dry season, the basin experiences high precipitation consistently, maintaining the river’s massive flow and the forest’s lush density.
Q78. Consider the following statements regarding the global distribution of lakes:
I. The majority of the world’s large freshwater lakes are situated in high northern latitudes formed by past glaciation.
II. Saltwater lakes are almost exclusively found in hot, arid, endorheic basins where evaporation exceeds precipitation.
III. The Caspian Sea contains the vast majority of the world’s saline lake water volume.
IV. Freshwater lakes contain a higher volume of the Earth’s total liquid freshwater than all flowing rivers combined.
V. Volcanic crater lakes account for more than half of the total global lake surface area.
Which of the above statement(s) is/are correct?
I. The majority of the world’s large freshwater lakes are situated in high northern latitudes formed by past glaciation.
II. Saltwater lakes are almost exclusively found in hot, arid, endorheic basins where evaporation exceeds precipitation.
III. The Caspian Sea contains the vast majority of the world’s saline lake water volume.
IV. Freshwater lakes contain a higher volume of the Earth’s total liquid freshwater than all flowing rivers combined.
V. Volcanic crater lakes account for more than half of the total global lake surface area.
Which of the above statement(s) is/are correct?
Explanation
The distribution of global lakes is shaped by climate and geological history. Most large lakes are found in northern latitudes due to past glaciation. Saltwater lakes typically occur in arid, endorheic basins. The Caspian Sea holds a massive share of the world’s saline water. While freshwater lakes hold significant volumes, volcanic crater lakes comprise only a small fraction of total area.
Q79. The massive, elongated estuary at the mouth of the Ob River, recognized as the world’s longest estuary, is known as:
Explanation
The Ob River in Russia is notable for its unique outfall into the Arctic Ocean. It forms the Gulf of Ob, which is recognized as the longest estuary in the world. This massive, elongated body of water serves as a transition zone between the freshwater of the river and the saline water of the Kara Sea, stretching for several hundred miles.
Q80. Identify the correct statement regarding the ultimate outfall of the Danube River.
Explanation
The Danube River is the second-longest river in Europe and serves as a major artery for the continent. It originates in the Black Forest of Germany and flows eastward through Central and Eastern Europe. Upon reaching the coast of Romania and Ukraine, the river forms an extensive delta before ultimately discharging its waters into the Black Sea.Answer key for these questions
| Q | Correct answer |
|---|---|
| 71 | (d) Barchan Dunes |
| 72 | (b) IV only |
| 73 | (c) Fertile silt from annual floods supported ancient farming |
| 74 | (b) II - I - III |
| 75 | (d) A-ii, B-iv, C-i, D-iii |
| 76 | (b) Lake Victoria |
| 77 | (c) Statement I is correct, but Statement II is incorrect. |
| 78 | (a) I, II, III, and IV |
| 79 | (a) The Gulf of Ob |
| 80 | (b) It forms a delta and empties into the Black Sea |
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.