CUET 2025 Environment Science MCQs for Practice

Environment Science MCQ Question Answers for CUET 2025

Environment Science MCQs– Practice the Environment Science MCQs suitable for various Entrance Exams including CUET. Learn and practice Environment Science questions and answers. Environment Science MCQ questions are very helpful for various competitive exams. CUET is a Common University Entrance Test that is now mandatory to take admission to Central Universities in India. Environment Science MCQ questions are based on the latest CUET 2025 exam pattern and other entrance exams, so that you can have a fair idea about exam trends that will be followed for various entrance exams.

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1. Of the solar energy coming into the Biosphere, what percentage of it is actually used in photosynthesis?

a.Less than 1

b.Between 1% and 15%

c.More than 2 %

d.Between 15% and 2%

2. The Biosphere is a region of earth which supports life. It includes- 1.Hydrosphere, 2.Lithosphere, 3.Stratosphere, 4.Troposphere

a.1 and 4

b.1,2 and 4

c.2, 3 and 4

d.1 and 3

3. Which of the following has maximum bio-diversity?

a.Rier

b.Tropical Region

c.Desert

d.Polar Region

4. Which of the following is least likely to be an effect of global warming?

a.Decreased rate of photosynthesis in vegetation

b.Loss of fertile delta region as for agriculture

c.Shrinking of the polar ice regions

d.Increase frequency of hurricanes

5. During Inversion:

a.Temperature increases with altitude

b.Temerature decreases with altitudfe

c.Temperature remians constant

d.None of the above

6. Which of the following gas affects human health by reducing the blood’s ability to carry oxygen to different parts of the body?

a.Nitrous dioxide

b.Carbon monoxide

c.Sulphur dioxide

d.Carbon Dioxide

7. Quantity of soil to be taken for texture analysis

a.30g

b.20g

c.10g

d.40g

8. Which of the following environments supports the growth of Mangrove Swamp?

a.Tidal Flat

b.Monsoon

c.Equatorial

d.Mixed

9. What term describes the idea that humans consider themselves to have a superior and fundamental place in the universe?

a.Egocentrism

b.Ethnocentrism

c.Narcissim

d.Anthropocentrism

10. EL-Nino is

a.Trophical Disturbance

b.Sea Storm

c.Warm Ocean Current

d.Another name of Typhoon

11. What was the first economic theory of international trade to be developed?

a.The Heckscher-Ohlin theory

b.The theory of absolute advantage

c.The theory of mercantilism

d.The theory of comparative advantage

12. The Earth summit was organised by

a.WHO

b.UNICEF

c.UNCED

d.UNESCO

13. World Environmental day is celebrated on ________ every year.

a.1st October

b.5th June

c.1st May

d.1st December

14. What sort of data describes meaning and experience?

a.Qualitative

b.Nomothetic

c.Quantitive

d.Idiographic

15. Disadvantages of green revolution

a.In order to protect crops from different types of disease caused by pest as well as the damages caused by insects, the farmers started using pesticides and insecticides at a high amount.

b.As the water and soil from the farming land are ruined either due to rain or flood, all the toxic content of pesticides and other chemicals present in the soil gets mixed with the nearby water source which leads to the death of aquatic organisms, mostly fish.

c.It decreases the production of the crops

d.It increases the production of the crops

16. Long path optical measurement uses _____________

a.None of the above

b.Ultraviolet radiation

c.Both a and b

d.IR Radiation

17. The environmental lapse rate is found to be:

a. 6.5°C/km

b. 5.6°C/km

c.– 6.5°C/km

d. 8.6°C/km

18. The method of soil conservation in which different crops are grown in alternate rows and are sown at different times to protect the soil from rain wash is called?

a.Intercropping

b.Mulching

c.Terrace Farming

d.Rock dam

19. Advantages of green revolution

a.In order to protect crops from different types of disease caused by pest as well as the damages caused by insects, the farmers started using pesticides and insecticides at a high amount.

b. It increases the production of the crops

c.The usage of a high quantity of pesticides and insecticides affects the plants

d.It explains the modern farming method ,example, irrigation method,

20. Which of these political issues does not fall under Public International Law?

a.A disputed National Election

b.Mining on the seabed of an ocean outside of territorial waters

c.A country claming to own the moon

d.A Policeman torturing a criminal suspect in a acountry where this is not considered illegal

21. Male gorillas have relatively small testicles compared to those of a chimpanzee because

a.The females exclusively mate one gorilla

b.They have a lower level of sexual activity

c.They have a different diet

d.They live in large communities

22. What was the green revolution based on ?

a.Planting more trees

b.Introduction of new plant varietiees

c.Crop Production

d.Planting of trees

23. In which year was the Green Revolution started ?

a.1978

b.1977

c.1965

d.1980

24. Anthropogenic is a _______-

a.Both a and b

b.None to fhe above

c.Modified Environment

d.Natural Environment

25. The method of soil conservation in the coastal and dry regions where rows of trees are planted to check the wind movement to protect soil cover is called

a.Rock dam

b.Contour barriers

c.Shelter belts

d.Mulching

26. Soil is eroded heavily due to deforestation, it affects the flowing of surface water badly. Which of the following is badly affected by these causes

a.Local plants

b.Human Resource

c.Climate

d.Ecological system

27. What is the biggest source of pollution in the world?

a.Automobile Laxity

b.Industrial Tributaties

c.Sewage and Garbage

d.Herbicide and Insecticide

28. Altruism can be defined as

a.Buying patronising Band Aid records at Christmas

b.An act that benefits the recipient at a cost to the donor

c.Ensuring that all individuals have equal access to resources

d.Working together for a common goal

29. Cast iron pipes are generally preferred to, because

a.Of longer life

b.All of the above

c.Of ease to join

d.Of moderate cost

30. Which of the following is a renewable source of energy?

a.Atomic Power

b.Thermal Power

c.Hydro Electric power

d.Natural gas

31. Which of the following is a major health consequence of environmental degradation, especially in developing countries?

a.Carbon sequestration

b.Winter kill

c.Biodiversity

d.Lack of clean water

32. The radiant energy received by the Earth from the sun is

a.Reflection

b.Refraction

c.Radiation

d.Insolation

33. The ‘natural law’ perspective on international law is most associated with which IR theory

a.Realism

b.Marxism

c.Liberalism

d.Critical Theory

34. Ozone depletion is caused due to increase in the level of

a.Carbon monoxide

b.Chlorofluorocarbon

c.Water Vapour

d.Oxygen

35. Environment includes

a.Oxygen and Nitrogen

b.Biotic component

c.Abiotic and iotic component

d.Abiotic Component

36. The Ozone hole over Antarctica was discovered in

a.1978

b.1985

c.1975

d.1987

37. Which of the following reduces the planet’s carrying capacity?

a.Increase land erosion

b.Increase resources

c.Technological improvement

d.reduced inequality

38. The scope of land reforms does not include-

a.All above

b.Tenancy reforms

c.Land reforms can encompass law

d.Intermediaries removal

39. Which of the following plants is extremely sensitive towards sulphur dioxide?

a.Onion

b.Potato

c.Corn

d.Tomato

40. The largest ecosystem of earth is

a.Lithosphere

b.Hydrospere

c.Biosphere

d.Biome

41. Which of the following represents the allowed rate of CO₂?

a.Less than 500 ppm

b.Less than 100 ppm

c.Less than 300 ppm

d.Less than 700 ppm

42. The first authoritative exposition of the national policy on tenancy reform is found in the document of the

a.Second Plan

b.Fourth Plan

c.First Plan

d.Third Plan

43. What sort of data describes numerical data?

a.Idiographic

b.Nomothetic

c.Qualitative

d.Quantitive

44. What is the benefit of rain water storage?

a.Respite from floods

b.Reduce the scarcity of water

c.Recharging ground water level

d.Protection from soil erosion

45. Which of the following is not poisonous to humans?

a.Stack Gases

b.Flue gases

c.None of the above

d.HCI

46. What is the ecological system integrating all living beings and their relationships?

a.Total Wild life

b.Biosphere

c.Lithosphere

d.Hydrosphere

47. According to the United Nations, the world’s major environmental problems include:

a.Deforestation

b.The quality of fresh water

c.Ozone depletion

d.All of the above

48. Long path optical measurement has a range of several kilometres.

a.Some of the statement is true but not completely

b.TRUE

c.FALSE

d.Some of the Statement is false but not completely

49. Global warming is expected to result in

a.Change in coastal line

b.Increase in sea level

c.Change in crop pattern

d.All of these

50. How many of your first cousins (your uncle and aunt's children) would need to survive to maintain the genetic presence in the world as you?

a.8

b.16

c.32

d.64

51. Many primates engage in social grooming, which is a very time-consuming activity. The main function of this is

a.To ensure the good health of all members of the group

b.To reinforce social bonds

c. To remove parasites from other individuals

d.To stimulate sexual activity

52. Transportation cost of trade affects:

a.All of the above

b.Global supply chains

c.Pattern of trade

d.Boundries bwteen tradable and non-tradable goods

53. Which fertiliser produce acidity in soil

a.Calcium ammonium nitrate

b.Calcium notrate

c.Sodium nitrate

d.Ammonium sulphate

54. The World’s largest biofuel plant has been established with a production capacity of 100 million litres per year, is located in

a.USA

b.Brazil

c.China

d.India

55. The method of soil conservation in which rocks are piled up to slow down the flow of water which prevents gullies and further soil loss is called

a.Mulching

b.Terrace Farming

c.Rock dam

d.Contour barriers

56. What are the four factor endowments?

a.National resources, labour, physical capital and human capital

b.International differences in climate

c.Material inputs used up in the process of production

d.Types of technology

57. Which is the first zone of purification in a sand bed?

a.Electrolytic zone

b.Schutzdecke zone

c.Heterotrophic zone

d.Autotrophic zone

58. Being able to adapt to changes in the environment is referred to as what?

a.Versatility

b.Survival of the fittest

c.Evolution

d.Natural Selection

59. The nitrate concentration in domestic water supplies, is generally limited to

a.30 ppm

b.10 ppm

c.15 ppm

d.45 ppm

60. The cause of reduction of forest coverage is

a.Tourism and Pilgrimage

b.Rising Population

c.Agriculture

d.Manufacturing Industry

61. What is 'HYV'

a.High yielding variety

b.Decreased yielding variety

c.Higer yeild variety

d.High yielding crops

62. Where is the secretariat of the Conference on Biological Diversity?

a.Italy

b.Toronto

c.London

d.Montreal

63. Soil colloidal particle shows the phenomena

a.Flocculation

b.Adhesion and Cohension

c.All of the above

d.Plasticity

64. When was the World Wildlife Fund founded?

a.1992

b.1965

c.1961

d.1969

65. The correct sequence in decreasing order of the albedo values of these ecosystem is::,1. Taiga,2. Tropical evergreen,3. Tropical deciduous,4. Tundra

a.1,4, 2, 3

b.1, 4, 3, 2

c.4, 1, 2, 3

d.4, 1, 3, 2

66. Which of these is the chief court of the UN?

a.International Criminal Court (ICC)

b.Eurpoean Court of Justice (ECJ)

c.International Court of Justice (ICJ)

d.Permanent court of International Justice (PCIJ)

67. Which of the following is an important Greenhouse Gas?

a.Chlorofluorocarbon

b.Carbon Monoxide

c.Freon

d.Carbon Dioxide

68. The phenomenon slickenside found in which soil

a.Gelisol

b.Inceptisol

c.Spodosa

d.Vertisol

69. Which of the following aquatic plants is effective in preventing the water-pollution caused by industrial waste?

a.Parthenium

b.Elephant Grass

c.Both b and c

d.Water Hyacinth

70. If a nation has an open economy it means that the nation:

a.Has fixed exchange rates

b.Allows private ownership of capital

c.Conducts trade with other countries

d.Has flexible exchange rates

71. The basic purpose of introducing land reforms has been adversely affected due to

a.All of these

b.poor implementation

c.Lack of political will

d.Shortcoming in legislation

72. How is comparative advantage defined?

a.You produce the things you are especially good at, and buy from others, the goods you are less efficient in producing.

b.To produce and consume all goods without trade

c.How the world actually works

d.Globalisation, growing economic linkages among countries

73. Among the following, the only secondary pollutant is:

a.Ozone

b.Sulphur tetra oxide

c.Sulphur dioxide

d.Sulphur tera Oxide

74. Due to growing demand of which of the following product, tropical forest are being damaged the most

a.Pork

b.Meat of Goat

c.Sugar

d.Beef

75. The concept of survival of the fittest refers to

a.The individuals who have characteristics that make them more attractive and hence more likely to get a mate

b. The individuals who are the strongest and most likely to survive

c.The individuals who work out the most

d.The individuals who have characteristics that fit in best to the environment

76. A no-trade world will have which of the following characteristics

a.All of the above

b.There will be no distortions or externalities

c.Countries will have same relative endowments of production factors

d.Consumers across countries will have identical and homogenous tastes

77. The first protocol to ban the emissions of chlorofluorocarbons in the atmosphere was made in

a.Montreal

b.Geneva

c.Florida

d.Osaka

78. The air pollutants are mainly classified as____________

a.Natural or anthripogennic pollutants

b.Point source and non-point source

c.Primary and secondary pollutants

d.None of the above

79. Nitrogen oxide affects human health by__________

a.Causing irritation to the eyes and skin

b.Decreasing blood's ability to transport oxygen

c.Aggravating asthma Problem

d.None of the above

80. What type of chemical weathering is enhanced by acid rain?

a.None of the above

b.Hydrolysis

c.Oxidation

d.Dissolution

81. The demographic transition is

a.The period when both crude birth and death rates rise

b.None of the above is correct

c.The period when crude birth and death rates are equal

d.The period between preindustrial and modern equality of crude birth and death rates

82. For which of the following reasons, it is necessary to secure a large area for forest?

a.Conservation of wild

b.Ecological balance

c.More rain

d.Absorption of carbon dioxide

83. Which one of the following ecosystems covers the largest area of the earth’s surface?

a.Mountain Ecosystem

b.Desert Ecosystem

c.Grassland Ecosystem

d.Marine Ecosystem

84. Which of the following types of pollution is Cultural eutrophication?

a.Thermal Pollution

b.Noise pollution

c.Soil Pollution

d.Water Pollution

85. International trade forces domestic firms to become more competitive in terms of

a.The introduction of new products

b.Product design and quality

c.Product price

d.All of the above

86. Which of the following is an air pollutant?

a.Carbon Dioxide

b.Carbon Monoxide

c.Oxygen

d.Nitrogen

87. International Trade is most likely to generate short-term unemployment in:

a.Import-competing industries

b. Industries that sell to domestic and foreign buyers

c.Industries in which there are neither imports nor exports

d.Industries that sell to only foreign buyers

88. Which has the maximum rate of deforestation?

a.Desert Zone

b.Northern Forest

c.Tropical Zone

d.Temperate Zone

89. Among the following climatic factors, which one has the least effect upon a terrestrial ecosystem?

a.Temperature variation

b.Conditions of sunlights

c.Wind

d.Availability of water

90. VOC stands for _______________

a.Volatile organic components

b.Varying organic components

c.Virtual organic carriage

d.Viable organic components

91. Land reforms policies in India have met with

a.None of the above

b.Complete failure

c.Tremendous success

d.Limited success

92. Rio Summit is associated with

a.Convention on Biological Diversity

b.Ozone depletion

c.Green House Gases

d.Wet Lands

93. The yield rates of crops between 1950 and 1998

a.Slighlty declined

b.Dramitically declined

c.None of the above

d.Dramatically increased

94. What are some of the costs of a high fertility rate and rapid population growth?

a.increase in the ration of depenedent to working age population

b.Diminshing returns to natural resources

c.All of the above

d.Rapid labour fore growth

95. Carbonates in water produce

a.Temporary hardness

b.Acidity

c.Both a and b

d.Permanent hardness

96. The evolution of hominids is generally believed to have begun around how many years ago?

a.50 million

b.50,000

c.250,000

d.2.5 Million

97. What does the phrase “anthropogenic CO₂ emissions” mean?

a.Human made CO₂ emissions

b.Industrial CO₂ emissions

c.Natural CO₂ emissions

d.All of the mentioned

98. Sustainable development means maximising

a.Income inequality

b.None of the above

c.Economic growth

d.The productivity of produced assets

99. In order for natural selection to occur, what must there be amongst individuals of each generation?

a.Unimited access to resource

b.Homogeneity

c.Variation

d.Harmony

100. What is the cause of the ‘Greenhouse effect’?

a.Nitrogen Dioxide

b.Nitrogen

c.Carbon Monoxide

d.Carbon Dioxide

101. Which of these is not an official source of Public International Law?

a.Custom

b.The opinions of international legal experts

c.International Treaties

d.Verdicts of the International Criminal court (ICC)

CUET 2025 Environment Science MCQ Question Answers – 100 MCQs for Practice

Environment Science MCQ Question Answers for CUET 2025

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