Test Series Prelims 2021

1. Which of the following explains why one side of a mountain usually has more precipitation than the other side?

(a) Mountains force air to rise, and air cools and releases moisture as it rises

(b) The atmosphere gets denser as elevation increases

(c) Temperatures are higher on one side of a mountain than on the other

(d)The land on one side is more green and lush than the other

Answer: (a)

Explaination: Mountains also cause air to rise. As the wind blows across a mountain range, air rises and cools and clouds can form on the windward side. This is why windward sides of mountain ranges tend to get heavy precipitation.

When the air sinks on the leeward side of the mountain range, it is usually much drier and warmer than it was to begin with

2. Which of the following statements describes an anticyclone?

(a) It is an area of low pressure

(b) It is an area of high pressure

(c) It has air masses that meet and rise

(d) It moves in the direction of the Earth’s rotation

Answer: (b)

Explaination: An anticyclone (that is, opposite to a cyclone) is a weather phenomenon defined by the United States National Weather Service’s glossary as “a large-scale circulation of winds around a central region of high atmospheric pressure, clockwise in the Northern Hemisphere, counterclockwise in the Southern Hemisphere”. Effects of surface-based anticyclones include clearing skies as well as cooler, drier air.

3. “They are the largest and deepest intrusive features. They are often the magma chambers of volcanoes.” To which intrusive volcanic landform is the above statement referring?

a) Batholith

b) Lopolith

c) Phacolith

d) Laccolith

Answer: (a)

Explaination: A batholith is a very large mass of intrusive igneous rock that forms and cools deep in the Earth’s crust. An igneous rock is a type of rock formed through the cooling of lava or magma. The term ‘batholith’ comes from the Greek words bathos, meaning ‘depth,’ and lithos, meaning ‘rock.’ In order for an intrusion to be called a batholith, the exposed area showing at the Earth’s surface should be at least 100 square kilometers, though ssome of these formations are much larger than that.

4. The type of soil called loam is made up of?

a) Purely humus

b) Mostly clayey

c) Nearly equal amount of sand, silt and clay

d) Sand and gravel

Answer: (c)

Explaination: Loam is soil composed mostly of sand (particle size > 63 µm), silt (particle size > 2 µm), and a smaller amount of clay (particle size < 2 µm). By weight, its mineral composition is about 40–40–20% concentration of sand-silt-clay, respectively. These proportions can vary to a degree, however, and result in different types of loam soils: sandy loam, silty loam, clay loam, sandy clay loam, silty clay loam, and loam. Loam soils generally contain more nutrients, moisture, and humus than sandy soils, have better drainage and infiltration of water and air than silt and clay-rich soils, and are easier to till than clay soils.

5. The most prominent feature in the oceans, forming an almost continuous mountain range, is the

a) Abyssal plain

b) Deep ocean trench

c) Seamount

d) Mid-ocean ridge

Answer: (d)

Explaination: A mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics.

This uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.

The mid-ocean ridges of the world are connected and form a single global mid-oceanic ridge system that is part of every ocean, making the mid-oceanic ridge system the longest mountain range in the world, with a total length of about 60,000 km.

6. The California Ocean current, which flows along the west coast of North America, is a?

a) Cold current, flowing south

b) Cold current, flowing north

c) Warm current, flowing north

d) Warm current, flowing south

Answer: (a)

Explaination: The California Current is a Pacific Ocean current that moves southward along the western coast of North America, beginning off southern British Columbia and ending off southern Baja California Peninsula. It is considered an Eastern boundary current due to the influence of the North American coastline on its course. It is also one of five major coastal currents affiliated with strong upwelling zones, the others being the Humboldt Current, the Canary Current, the Benguela Current, and the Somali Current. The California Current is part of the North Pacific Gyre, a large swirling current that occupies the northern basin of the Pacific.

7. ‘Syntaxial Bend’ is a feature of which one of the following?

a) Himalayas

b) Aravallis

c) Satpuras

d) Vindhyas

Answer: (a)

Explaination: The general east-west trend of the Himalayas terminates suddenly at its western and eastern extremities and the ranges are sharply bent southward in deep knee-bend flextures which are called Syntaxial bends. Western Syntaxial bend is near Nanga Parbat and eastern Syntaxial bend is near Namcha Barwa   

8. Which one of the following is the junction point of the Eastern Ghats and Western Ghats?

a) Javadi hills

b) Anaimalai hills

c) Nilgiri hills

d) Shevaroy hills

Answer: (c)

Explaination: The Nilgiri, far south in Tamil Nadu is the meeting place of the Western Ghats, the Eastern Ghats and the Southern hills, rising abruptly from the surrounding areas, it has the highest peak of Doddabeta ( 2,637 m ) and Udagammdulam (Ooty) hill station.

9. Bhabar belt is found in the?

a) Chota Nagpur plateau

b) Himalayan Piedmont zone

c) Western Ghats

d) Coastal Orissa

Answer: (b)

The Bhabar belt is a narrow belt about 8-16 km wide running in east-west direction along the foot of the Shivaliks with a remarkable continuity from the Indus to the Teesta. Rivers descending from the Himalayas deposit their load along the foothills in the form of alluvial fans.

10. During winter, north-western part of India gets rainfall from?

a) Thunderstroms

b) Retreating monsoon

Tropical cyclones

Western disturbances

Answer: (d)

Explaination: A Western Disturbance is an extra tropical storm originating in the Mediterranean region that brings sudden winter rain to the northwestern parts of the Indian subcontinent. It is a non-monsoonal precipitation pattern driven by the westerlies. The moisture in these storms usually originates over the Mediterranean Sea and the Atlantic Ocean. Extra tropical storms are a global phenomena with moisture usually carried in the upper atmosphere, unlike their tropical counterparts where the moisture is carried in the lower atmosphere. 

  1. Which one of the following pairs of lands is separated from each other by the ‘Ten Degree Channel’

a) Andaman and Nicobar

b) Nicobar and Sumatra

c) Maldives and Lakshadweep

d) Sumatra and Java

Answer: (a)

Explaination: The Ten Degree Channel is a channel that separates the Andaman Islands and Nicobar Islands from each other in the Bay of Bengal. Ten degrees Channel which lies between Little Andaman Island and the Car Nicobar.

  1. Which one of the following places is located at the confluence of Alaknanda and Bhagirathi?

a) Vishnuprayag

b) Devaprayag

c) Rudrapravag

d) Karnaprayag

Answer: (b)


  • Devaprayag –  Confluence of Alaknanda and Bhagirathi
  • Vishnuprayag – Confluence of Alaknanda and Dhauliganga
  • Rudraprayag –   Confluence of Alaknanda and Mandakini
  • Karanprayag –  Confluence of Alaknanda and Pindar
  • Consider the following

1. Coal – Ranigunj

2. Diamond – Panna

Which of the following is/are correctly matched

a) 1 only

b) 2 only

c) Both 1 and 2

d) None of the above

Answer: (c)

  1. As per 2011 census which amongst of the following states has already achieved the replacement level of fertility

a) Assam

b) Andhra Pradesh

c) Madhya Pradesh

d) Jammu Kashmir

Answer: (b)

  1. Consider the following statements

1. After Arunachal Pradesh, Assam is the Eastern most state in India

2. Tripura shares international boundary with Myanmar

Which of the following statements is/are correct?

a) 1 only

b) 2 only

c) Both 1 and 2

d) None of the above

Answer: (a)

  1. River Wainganga is a tributary of?

a) Krishna

b) Narmada

c) Godavari

d) Kaveri

Answer: (c)

  1. Great Nicobar, the southernmost island of Nicobar Islands is nearest to which of the following country?

a) Myanmar

b) Malaysia

c) Thailand

d) Indonesia

Answer: (d)

  1. Silent valley National Park is located in?

a) Anaimalai hills

b) Palani hills

c) Nilgiri hills

d) Cardamom hills

Answer: (c)

  1. Which of the following lake is NOT part of Great Lakes region of North America?

a) Lake Superior

b) Great Slave Lake

c) Michigan Lake

d) Lake Huron

Answer: (b)

  • Which of the following is the longest river of Asia?

a) Brahmaputra

b) Indus

c) Yangtze

d) Mekong

Answer: (c)