🟢 Geography Optional – Prelims Level
Previous Questions & Answers (Concept-Based)
Page – 2
UPSC / UPPSC | Shaktimatha 369 Learning
Q8. Which layer of the atmosphere contains the ozone layer?
Options:
- A. Troposphere
- B. Stratosphere
- C. Mesosphere
- D. Thermosphere
Correct Answer: B. Stratosphere
Explanation:
The ozone layer is concentrated in the stratosphere, where it absorbs harmful ultraviolet radiation. This layer protects life on Earth.
Q9. Which one of the following ocean currents is a cold current?
- A. Gulf Stream
- B. Kuroshio Current
- C. Canary Current
- D. Brazil Current
Correct Answer: C. Canary Current
Explanation:
Cold currents flow from higher latitudes to lower latitudes. The Canary Current cools the western coast of North Africa.
Q10. Laterite soils are formed mainly due to:
- A. Deposition of river sediments
- B. Volcanic activity
- C. Intense leaching under high rainfall
- D. Wind erosion
Correct Answer: C. Intense leaching under high rainfall
Explanation:
Laterite soils develop in regions of high temperature and heavy rainfall, where leaching removes silica and leaves iron and aluminium oxides.
Q11. Which type of natural vegetation is found in areas of low rainfall and long dry season?
- A. Tropical evergreen forests
- B. Tropical deciduous forests
- C. Thorn forests
- D. Mangrove forests
Correct Answer: C. Thorn forests
Explanation:
Thorn forests are adapted to arid and semi-arid regions. Plants have small leaves and deep roots to reduce water loss.
Q12. Which of the following factors is most responsible for the formation of deserts on the western margins of continents?
- A. Warm ocean currents
- B. Cold ocean currents
- C. Mountain barriers
- D. Cyclonic circulation
Correct Answer: B. Cold ocean currents
Explanation:
Cold currents reduce evaporation and suppress rainfall, leading to desert formation along western continental margins.
Q13. Which one of the following best explains the term “continental shelf”?
- A. Deep ocean basin
- B. Submerged extension of the continent
- C. Mid-oceanic ridge
- D. Ocean trench
Correct Answer: B. Submerged extension of the continent
Explanation:
The continental shelf is the gently sloping submerged edge of a continent and is rich in fisheries and minerals.
Prelims Key Insight:
UPSC tests fundamentals using indirect wording.
Concept clarity = correct answer.
End of Prelims Level – Page 2
Shaktimatha 369 Learning
.png)
No comments:
Post a Comment