Skip to content
GK24
Prime
GeographyEasyAsked in: SSC GD Constable · 14 Feb 2019, Shift 3

Sandstone is an example of:

  1. A.non-foliated rock
  2. B.sedimentary rock
  3. C.igneous rock
  4. D.metamorphic rock

Correct answer

B. sedimentary rock

Explanation

The correct answer is B, sedimentary rock. Sandstone forms when grains of sand carried by rivers, wind or waves settle in layers and are cemented together over long periods, which makes it a sedimentary rock. Rocks are of three kinds. Igneous rocks form from cooling magma or lava, sedimentary rocks from the deposition and compaction of sediments, and metamorphic rocks when heat and pressure change an existing rock. Sedimentary rocks often show layers and may hold fossils, and coal and limestone belong to this group. Under heat and pressure sandstone turns into quartzite, limestone into marble and shale into slate. Option A is wrong because non-foliated is a description of texture used for metamorphic rocks such as marble and quartzite, not a class of its own. Option C is wrong because basalt and granite are igneous rocks. Option D is wrong because slate, marble and gneiss are metamorphic rocks. Exam tip: sandstone becomes quartzite, limestone becomes marble, shale becomes slate and granite becomes gneiss.

Practice Questions

View all
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.