Static Quiz 12 March 2025 (Geography)
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Static Quiz 12 March 2025 (Geography) For UPSC Exam
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- Question 1 of 5
1. Question
With reference to antecedent rivers, consider the following statements:
1. These rivers maintain their original course despite tectonic uplift.
2. The Brahmaputra River is an example of an antecedent river due to its path through the Himalayas.
Which of the statements given above is/are correct?CorrectCorrect Answer: (c) Both 1 and 2
Explanation: Antecedent rivers are those that existed before the uplift of the land and continued to erode through it, maintaining their original path. Statement 1 is correct as this defines an antecedent river. Statement 2 is also correct because the Brahmaputra cuts through the rising Himalayas, notably in the Tsangpo Gorge, making it a classic example.
IncorrectCorrect Answer: (c) Both 1 and 2
Explanation: Antecedent rivers are those that existed before the uplift of the land and continued to erode through it, maintaining their original path. Statement 1 is correct as this defines an antecedent river. Statement 2 is also correct because the Brahmaputra cuts through the rising Himalayas, notably in the Tsangpo Gorge, making it a classic example.
- Question 2 of 5
2. Question
Which of the following drainage patterns is most likely to develop in a region with uniform rock resistance and a gentle slope?
CorrectCorrect Answer: (b) Dendritic
Explanation: A dendritic pattern resembles tree branches and forms in areas with uniform rock resistance and gentle slopes, where water flows naturally without structural control. Trellis requires alternating resistant and weak rock, rectangular needs faulted terrain, and radial forms around a central high point like a volcano.
IncorrectCorrect Answer: (b) Dendritic
Explanation: A dendritic pattern resembles tree branches and forms in areas with uniform rock resistance and gentle slopes, where water flows naturally without structural control. Trellis requires alternating resistant and weak rock, rectangular needs faulted terrain, and radial forms around a central high point like a volcano.
- Question 3 of 5
3. Question
Consider the following pairs:
River Feature Description
1. Oxbow Lake A U-shaped lake formed by a meander cutoff
2. Alluvial Fan A fan-shaped deposit at a river’s mouth
3. Gorge A narrow, steep-sided valleyWhich of the pairs given above is/are correctly matched?
CorrectCorrect Answer: (b) 1 and 3 only
Explanation: Pair 1 is correct—oxbow lakes form when a meander is cut off. Pair 3 is correct—gorges are narrow, steep valleys carved by rivers. Pair 2 is incorrect—alluvial fans form at the base of slopes (e.g., where a river exits mountains), not typically at a river’s mouth, where deltas are more common.
IncorrectCorrect Answer: (b) 1 and 3 only
Explanation: Pair 1 is correct—oxbow lakes form when a meander is cut off. Pair 3 is correct—gorges are narrow, steep valleys carved by rivers. Pair 2 is incorrect—alluvial fans form at the base of slopes (e.g., where a river exits mountains), not typically at a river’s mouth, where deltas are more common.
- Question 4 of 5
4. Question
The drainage density of a basin is influenced by which of the following factors?
1. Annual rainfall
2. Soil permeability
3. Vegetation cover
Select the correct answer using the code given below:CorrectCorrect Answer: (d) 1, 2, and 3
Explanation: Drainage density (stream length per unit area) increases with higher rainfall (more runoff), lower soil permeability (less infiltration), and sparse vegetation (less interception of water). All three factors directly influence how much water enters streams, affecting drainage density.
IncorrectCorrect Answer: (d) 1, 2, and 3
Explanation: Drainage density (stream length per unit area) increases with higher rainfall (more runoff), lower soil permeability (less infiltration), and sparse vegetation (less interception of water). All three factors directly influence how much water enters streams, affecting drainage density.
- Question 5 of 5
5. Question
Which one of the following rivers does NOT form a delta at its mouth?
CorrectCorrect Answer: (c) Narmada
Explanation: The Ganga, Godavari, and Krishna all form deltas where they deposit sediment at their mouths in the Bay of Bengal. The Narmada, however, flows into the Arabian Sea through a rift valley and forms an estuary, not a delta, due to its steep gradient and tidal influence.
IncorrectCorrect Answer: (c) Narmada
Explanation: The Ganga, Godavari, and Krishna all form deltas where they deposit sediment at their mouths in the Bay of Bengal. The Narmada, however, flows into the Arabian Sea through a rift valley and forms an estuary, not a delta, due to its steep gradient and tidal influence.
