Rocks and Soils — 15 Geography of India PYQs with Answers | UKPSC PYQ Hub

Question 1

Which of the following statements is not true, with respect to ‘Laterite soils’ in India?

Accepted Answer

They are moisture retentive with large clay factor.. Laterite soil develops in area of high temperature and heavy rainfall. This soil is affected by the leaching process. Generally, abundance of Iron, Potash and Aluminum and deficiency of nitrogen, lime, phosphate and organic matter is found in this soil. Laterite soil is used to make bricks for building houses that is, it provides construction material. This soil become soft when wet and becomes hard and Lumpy when dry. This soil is not similar to clay factor. Hence, option (d) is not correct answer.

Question 2

Basaltic Lava rocks over Indian Deccan Plateau are formed in the following period:

Accepted Answer

Cretaceous period. Basaltic Lava rocks over Indian Deccan Plateau are formed during Cretaceous period. Basaltic lava rocks were laid down during massive deccan volcanic eruptions. It occurred towards the end of the cretaceous period between sixty-seven and sixty-six million years ago.

Question 3

'Khadar' is

Accepted Answer

New Alluvial Soil. Khadar means the low land near the river where rain water accumulates and every year flood water creates new alluvial soil.

Question 4

The Kjeldahl method is adopted to measure–

Accepted Answer

Nitrogen content in soil or plants. Kjeldahl method, in analytical chemistry, procedure widely used for estimating the nitrogen content of foodstuffs, fertilizers and other substances. It was in vented in 1883 by a Danish chemist, Johan G.C.T. Kjeldahl.

Question 5

Which among of the following animal is called as - 'Ploughers of the soil'?

Accepted Answer

Earthworm. Earthworm is called as - 'Ploughers of the soil'. Earthworms are called as nature's ploughman because they loosen the soil when they burrow and this is good for the soil because it lets the CO out and the O in. It also helps to mix the n utrients in the soil, making it better for plants to grow.

Question 6

Which of the following is not an example of Metamorphic rock?

Accepted Answer

Dolomite. Metamorphism is a process by which already consolidated rocks undergo recrystallisation and reorganization of materials within original rocks Gneissoid, syenite, slate, schist, marble, quartzite etc. are some examples of metamorphic rock.

Question 7

The water retaining/carrying capacity of which type of soil is lowest?

Accepted Answer

Loam sandy soil. Loam sandy soil has the lowest water retaining capacity. Water holding capacity order- Clay soil > Silt soil > Loamy soil > Sandy soil. Sandy soil mostly consists of sand and clay. The water holding capacity of this soil is very low.

Question 8

Which one of the following is most fertile soil?

Accepted Answer

Alluvial soil. Out of the given options Alluvial soils are most fertile soil in India. It is formed by deposition of alluvium and sediments carried by rivers and sea waves over many years which makes this soil very fertile.