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Geomorphology - Geography Multiple Choice Questions and Answers for UPSC Exam

Questions
21 Which of the following processes are involved in formation of sedimentary rocks ?
A Mountain building
B Lithification
C Fractional crystallization
D None of these

Answer: Option [B]

The correct answer is Lithification. The most important geological processes that lead to the creation of sedimentary rocks are erosion, weathering, dissolution, precipitation, and lithification.

22 Which of the following is related to Shield volcano formation ?
A Explosive lava eruptions
B Repeated lava flows
C Loose, grainy cinders
D Ejection of a wide range of pyroclastic materials

Answer: Option [B]

The correct answer is Repeated lava flows. Most shield volcanoes are formed from fluid, basaltic lava flows.

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23 Which type of volcanic eruption is the most explosive ?
A Strombolian Eruption
B Vulcanian Eruption
C Plinian Eruption
D Surtseyan Eruption

Answer: Option [C]

The correct answer is Plinian Eruption. A Plinian eruption is the most explosive of the eruption types.

24 What kind of volcanic eruption is least explosive ?
A Hawaiian Eruption
B Strombolian Eruption
C Lava Domes
D Surtseyan Eruption

Answer: Option [A]

The correct answer is Hawaiian Eruption. A Hawaiian eruption is a type of volcanic eruption where lava flows from the vent in a relatively gentle, low level eruption; it is so named because it is characteristic of Hawaiian volcanoes.

25 What is the longest mountain range in the world ?
A Andes
B Coast mountain
C Himalayas
D Western Ghats

Answer: Option [A]

The correct answer is Andes. The world's longest above-water mountain range is the Andes, about 7,000 km long. The range stretches from north to south through seven countries in South America, along the west coast of the continent: Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile, and Argentina.

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