UPSC Prelims Geography previous year questions in the "Multi-statement (How Many Style)" question pattern — real questions with answers and explanations.
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2024Multi-statement (How Many Style)Geomorphology & Lithosphere
Consider the following:
1. Pyroclastic debris
2. Ash and dust
3. Nitrogen compounds
4. Sulphur compounds
How many of the above are products of volcanic eruptions?
A.Only one
B.Only two
C.Only three
D.All four
Explanation: * Items 1, 2, 3, and 4 are correct: Volcanic eruptions project an array of molten, fragmented, and gaseous materials sourced from the weaker asthenosphere layer of the upper mantle. * The physical material discharged includes liquid lava flows, high-velocity fragments of pyroclastic debris, volcanic bombs, fine ash, and gas complexes like nitrogen compounds, sulphur compounds, and trace amounts of chlorine, hydrogen, and argon. Thus, all four items are products.