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Consider the following statements regarding rocks :
1. Usually, the intrusive rocks formed below the Earth's surface have coarse grains, while extrusive rocks contain fine grains of minerals.
2. Silica and aluminum-containing rocks are basic rocks, while iron and magnesium-rich soils are acidic rocks.
Which of the statements given above is/are correct ?
- a)1 only
- b)2 only
- c)Both 1 and 2
- d)Neither 1 nor 2
Correct answer is option 'A'. Can you explain this answer?
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Consider the following statements regarding rocks :1. Usually, the int...
Intrusive (plutonic) rocks form when magma solidifies within the crust below the surface. It usually cools slowly and produces large crystals. Slow cooling means the individual mineral grains have a very long time to grow, so they grow to a relatively large size. Intrusive rocks have a coarse-grained texture.
- Extrusive (volcanic) rocks form when magma erupts onto the surface of the Earth as lava flows, and usually cools quickly producing small crystals.
- Intrusive igneous rocks cool and crystallize slowly within the earth and so have coarse grains.
- Extrusive (volcanic) igneous rocks cool and crystallize rapidly on the earth's surface and so have fine grains. Extrusive rocks frequently contain some larger, well-shaped, crystals surrounding by the fine- grained material. So, Statement 1 is correct. Acidic rocks are characterized by a high content of silica (quartz and feldspar) — up to 80 percent. The rest is divided among aluminium, alkalis, magnesium, iron oxide, lime etc.
- These rocks have a lesser content of heavier minerals like iron and magnesium. Hence, they are less dense and lighter in colour than basic rocks.
- These rocks constitute the sial portion of the crust. Silica and aluminum-rich rocks, such as granite, are generally classified as acidic rocks. While iron and magnesium-rich rocks are generally classified as basic rocks, such as Basalt, gabbro and dolerite are the examples.
- These rocks are poor in silica (about 40 percent); magnesia content is up to 40 percent, and the remaining is spread over iron oxide, lime, aluminium, alkalis, potassium etc. So, Statement 2 is not correct.
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Consider the following statements regarding rocks :1. Usually, the intrusive rocks formed below the Earths surface have coarse grains, while extrusive rocks contain fine grains of minerals.2. Silica and aluminum-containing rocks are basic rocks, while iron and magnesium-rich soils are acidic rocks.Which of the statements given above is/are correct ?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer?
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Consider the following statements regarding rocks :1. Usually, the intrusive rocks formed below the Earths surface have coarse grains, while extrusive rocks contain fine grains of minerals.2. Silica and aluminum-containing rocks are basic rocks, while iron and magnesium-rich soils are acidic rocks.Which of the statements given above is/are correct ?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements regarding rocks :1. Usually, the intrusive rocks formed below the Earths surface have coarse grains, while extrusive rocks contain fine grains of minerals.2. Silica and aluminum-containing rocks are basic rocks, while iron and magnesium-rich soils are acidic rocks.Which of the statements given above is/are correct ?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements regarding rocks :1. Usually, the intrusive rocks formed below the Earths surface have coarse grains, while extrusive rocks contain fine grains of minerals.2. Silica and aluminum-containing rocks are basic rocks, while iron and magnesium-rich soils are acidic rocks.Which of the statements given above is/are correct ?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer?.
Consider the following statements regarding rocks :1. Usually, the intrusive rocks formed below the Earths surface have coarse grains, while extrusive rocks contain fine grains of minerals.2. Silica and aluminum-containing rocks are basic rocks, while iron and magnesium-rich soils are acidic rocks.Which of the statements given above is/are correct ?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Consider the following statements regarding rocks :1. Usually, the intrusive rocks formed below the Earths surface have coarse grains, while extrusive rocks contain fine grains of minerals.2. Silica and aluminum-containing rocks are basic rocks, while iron and magnesium-rich soils are acidic rocks.Which of the statements given above is/are correct ?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements regarding rocks :1. Usually, the intrusive rocks formed below the Earths surface have coarse grains, while extrusive rocks contain fine grains of minerals.2. Silica and aluminum-containing rocks are basic rocks, while iron and magnesium-rich soils are acidic rocks.Which of the statements given above is/are correct ?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer?.
Solutions for Consider the following statements regarding rocks :1. Usually, the intrusive rocks formed below the Earths surface have coarse grains, while extrusive rocks contain fine grains of minerals.2. Silica and aluminum-containing rocks are basic rocks, while iron and magnesium-rich soils are acidic rocks.Which of the statements given above is/are correct ?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for UPSC.
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Consider the following statements regarding rocks :1. Usually, the intrusive rocks formed below the Earths surface have coarse grains, while extrusive rocks contain fine grains of minerals.2. Silica and aluminum-containing rocks are basic rocks, while iron and magnesium-rich soils are acidic rocks.Which of the statements given above is/are correct ?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer?, a detailed solution for Consider the following statements regarding rocks :1. Usually, the intrusive rocks formed below the Earths surface have coarse grains, while extrusive rocks contain fine grains of minerals.2. Silica and aluminum-containing rocks are basic rocks, while iron and magnesium-rich soils are acidic rocks.Which of the statements given above is/are correct ?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of Consider the following statements regarding rocks :1. Usually, the intrusive rocks formed below the Earths surface have coarse grains, while extrusive rocks contain fine grains of minerals.2. Silica and aluminum-containing rocks are basic rocks, while iron and magnesium-rich soils are acidic rocks.Which of the statements given above is/are correct ?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Consider the following statements regarding rocks :1. Usually, the intrusive rocks formed below the Earths surface have coarse grains, while extrusive rocks contain fine grains of minerals.2. Silica and aluminum-containing rocks are basic rocks, while iron and magnesium-rich soils are acidic rocks.Which of the statements given above is/are correct ?a)1 onlyb)2 onlyc)Both 1 and 2d)Neither 1 nor 2Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice UPSC tests.
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