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“Volcanism as an endogenic process includes the movement of molten rocks (magma) onto or towards the earth’s surface.” In this context, consider the following statements:

1. The process of cooling and solidification of magma can happen in the earth’s crust or over the surface of the earth.

2. Sudden cooling of the molten material at the earth’s surface results in small and smooth grains.

3. Acidic lavas have a lower percentage of silica than Basic lavas.


Q. Which of the above statements is/are correct?

  • a)
    1 only

  • b)
    1 and 2 only

  • c)
    1 and 3 only

  • d)
    2 and 3 only

Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
“Volcanism as an endogenic process includes the movement of molt...
Ans -- B)
Statement 1) and statement 2) are correct.
But acidic lava consists of higher percentage of silica than basic one.
Note -- silica in acidic lava ~ 45%
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“Volcanism as an endogenic process includes the movement of molten rocks (magma) onto or towards the earth’s surface.” In this context, consider the following statements:1. The process of cooling and solidification of magma can happen in the earth’s crust or overthe surface of the earth.2. Sudden cooling of the molten material at the earth’s surface results in small and smooth grains.3. Acidic lavas have a lower percentage of silica than Basic lavas.Q. Which of the above statements is/are correct?a)1 onlyb)1 and 2 onlyc)1 and 3 onlyd)2 and 3 onlyCorrect answer is option 'B'. Can you explain this answer?
Question Description
“Volcanism as an endogenic process includes the movement of molten rocks (magma) onto or towards the earth’s surface.” In this context, consider the following statements:1. The process of cooling and solidification of magma can happen in the earth’s crust or overthe surface of the earth.2. Sudden cooling of the molten material at the earth’s surface results in small and smooth grains.3. Acidic lavas have a lower percentage of silica than Basic lavas.Q. Which of the above statements is/are correct?a)1 onlyb)1 and 2 onlyc)1 and 3 onlyd)2 and 3 onlyCorrect answer is option 'B'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about “Volcanism as an endogenic process includes the movement of molten rocks (magma) onto or towards the earth’s surface.” In this context, consider the following statements:1. The process of cooling and solidification of magma can happen in the earth’s crust or overthe surface of the earth.2. Sudden cooling of the molten material at the earth’s surface results in small and smooth grains.3. Acidic lavas have a lower percentage of silica than Basic lavas.Q. Which of the above statements is/are correct?a)1 onlyb)1 and 2 onlyc)1 and 3 onlyd)2 and 3 onlyCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for “Volcanism as an endogenic process includes the movement of molten rocks (magma) onto or towards the earth’s surface.” In this context, consider the following statements:1. The process of cooling and solidification of magma can happen in the earth’s crust or overthe surface of the earth.2. Sudden cooling of the molten material at the earth’s surface results in small and smooth grains.3. Acidic lavas have a lower percentage of silica than Basic lavas.Q. Which of the above statements is/are correct?a)1 onlyb)1 and 2 onlyc)1 and 3 onlyd)2 and 3 onlyCorrect answer is option 'B'. Can you explain this answer?.
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