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GeographyEasyAsked in: SSC GD Constable · 12 Jan 2023, Shift 3

Which of the following is NOT a sedimentary rock?

  1. A.Granite
  2. B.Sand stone
  3. C.Loess
  4. D.Shale

Correct answer

A. Granite

Explanation

The correct answer is A, Granite. Granite is an igneous rock, not a sedimentary one. It forms when magma cools slowly deep inside the crust, so its crystals of quartz, feldspar and mica are large enough to see; because it cooled below the surface it is called an intrusive or plutonic rock. Sedimentary rocks are different: they are built up in layers from sediment that water, wind or ice deposits and then compacts and cements. Option B is wrong because sandstone is sedimentary, made of cemented sand grains. Option C is wrong because loess is sedimentary too, a fine silt carried and dropped by wind, and it makes the fertile soil of northern China. Option D is wrong because shale is sedimentary, formed from compressed clay and mud. Granite turns into the metamorphic rock gneiss under heat and pressure. Exam tip: granite and basalt igneous; sandstone, shale, limestone and loess sedimentary; marble, gneiss, slate and quartzite metamorphic.

Practice Questions

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Q2.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following statements is/are correct? 1. Himalayan rivers have their origin in the snow-covered areas, hence are dry in winter season. 2. Rivers of the Peninsular Plateau have reached maturity. 3. Himalayan rivers depict all the three stages of normal cycle of erosion. Select the correct answer using the code given below.

  1. A.2 only
  2. B.1 and 3 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: C. 2 and 3 only

Himalayan rivers are perennial, so statement 1 is wrong, while statements 2 and 3 are correct. Himalayan rivers such as the Ganga, Indus and Brahmaputra rise from glaciers and snowfields and also get monsoon rain, so they flow all year round, including in winter.

Q3.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following statements related to latitude are true? 1. Rainfall, temperature and vegetation vary with latitude. 2. The difference between the longest day and the shortest day increases with latitude. 3. Indira Point is located approximately at 6°45' N latitude. Select the correct answer using the code given below.

  1. A.1 and 2 only
  2. B.1 and 3 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: D. 1, 2 and 3

All three statements about latitude are true. Latitude decides how directly the Sun's rays strike a place, so temperature, rainfall and the type of vegetation change from the equator towards the poles, from hot, wet rainforests to cold tundra.

Q4.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following lakes is/are situated in Ladakh? 1. Tso Kar 2. Pangong Tso 3. Tsomgo 4. Tso Moriri Select the correct answer using the code given below.

  1. A.1 only
  2. B.2 and 3
  3. C.1, 2 and 4
  4. D.2 and 4 only
Show answer
Correct answer: C. 1, 2 and 4

Tso Kar, Pangong Tso and Tso Moriri are high-altitude lakes of Ladakh, while Tsomgo lies in Sikkim. Pangong Tso, at about 4,350 metres, is a long, narrow lake that stretches from Ladakh into Tibet, and most of its length lies on the Chinese side.