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. Which has the maximum rate of deforestation?

a.Northern Forest

b.Temperate Zone

c.Tropical Zone

d.Desert Zone

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

a.Temperature variation

b.Availability of water

c.Conditions of sunlights

d.Wind

3. Rio Summit is associated with

a.Green House Gases

b.Ozone depletion

c.Convention on Biological Diversity

d.Wet Lands

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

a.Shortcoming in legislation

b.poor implementation

c.All of these

d.Lack of political will

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

a. Industries that sell to domestic and foreign buyers

b.Industries that sell to only foreign buyers

c.Industries in which there are neither imports nor exports

d.Import-competing industries

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

a.1st May

b.1st October

c.1st December

d.5th June

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

a.Less than 100 ppm

b.Less than 300 ppm

c.Less than 700 ppm

d.Less than 500 ppm

8. The largest ecosystem of earth is

a.Lithosphere

b.Biome

c.Biosphere

d.Hydrospere

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

a.30 ppm

b.10 ppm

c.45 ppm

d.15 ppm

10. Global warming is expected to result in

a.Increase in sea level

b.Change in coastal line

c.Change in crop pattern

d.All of these

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

a.TRUE

b.FALSE

c.Some of the Statement is false but not completely

d.Some of the statement is true but not completely

12. 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 Dioxide

c.Sulphur dioxide

d.Carbon monoxide

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

a.Noise pollution

b.Soil Pollution

c.Water Pollution

d.Thermal Pollution

14. The yield rates of crops between 1950 and 1998

a.Dramitically declined

b.None of the above

c.Dramatically increased

d.Slighlty declined

15. The air pollutants are mainly classified as____________

a.Primary and secondary pollutants

b.None of the above

c.Natural or anthripogennic pollutants

d.Point source and non-point source

16. 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.Rock dam

b.Terrace Farming

c.Mulching

d.Intercropping

17. The Ozone hole over Antarctica was discovered in

a.1978

b.1975

c.1985

d.1987

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

a.Desert Ecosystem

b.Marine Ecosystem

c.Grassland Ecosystem

d.Mountain Ecosystem

19. Land reforms policies in India have met with

a.Complete failure

b.None of the above

c.Tremendous success

d.Limited success

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

a.Egocentrism

b.Anthropocentrism

c.Ethnocentrism

d.Narcissim

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

a.Carbon sequestration

b.Biodiversity

c.Lack of clean water

d.Winter kill

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

a.Between 15% and 2%

b.Between 1% and 15%

c.Less than 1

d.More than 2 %

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

a.HCI

b.None of the above

c.Flue gases

d.Stack Gases

24. The Earth summit was organised by

a.UNESCO

b.UNICEF

c.WHO

d.UNCED

25. What sort of data describes meaning and experience?

a.Quantitive

b.Nomothetic

c.Qualitative

d.Idiographic

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

a.Sulphur tera Oxide

b.Sulphur tetra oxide

c.Sulphur dioxide

d.Ozone

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

a.Polar Region

b.Tropical Region

c.Rier

d.Desert

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

a.Nitrogen

b.Carbon Monoxide

c.Carbon Dioxide

d.Nitrogen Dioxide

29. Altruism can be defined as

a.Buying patronising Band Aid records at Christmas

b.Working together for a common goal

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

d.Ensuring that all individuals have equal access to resources

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

a.The introduction of new products

b.Product design and quality

c.All of the above

d.Product price

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

a.Increase frequency of hurricanes

b.Decreased rate of photosynthesis in vegetation

c.Loss of fertile delta region as for agriculture

d.Shrinking of the polar ice regions

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

a.To stimulate sexual activity

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

c. To remove parasites from other individuals

d.To reinforce social bonds

33. Sustainable development means maximising

a.Income inequality

b.None of the above

c.Economic growth

d.The productivity of produced assets

34. Disadvantages of green revolution

a.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.

b.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.

c.It increases the production of the crops

d.It decreases the production of the crops

35. The phenomenon slickenside found in which soil

a.Inceptisol

b.Spodosa

c.Vertisol

d.Gelisol

36. Which fertiliser produce acidity in soil

a.Ammonium sulphate

b.Calcium ammonium nitrate

c.Calcium notrate

d.Sodium nitrate

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

a.Montreal

b.Geneva

c.Florida

d.Osaka

38. The environmental lapse rate is found to be:

a. 6.5°C/km

b.– 6.5°C/km

c. 5.6°C/km

d. 8.6°C/km

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

a.Dissolution

b.None of the above

c.Hydrolysis

d.Oxidation

40. In which year was the Green Revolution started ?

a.1980

b.1978

c.1977

d.1965

41. Advantages of green revolution

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

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

c. It increases the production of the crops

d.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.

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

a.Both b and c

b.Parthenium

c.Elephant Grass

d.Water Hyacinth

43. What are the four factor endowments?

a.Material inputs used up in the process of production

b.Types of technology

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

d.International differences in climate

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

a.Automobile Laxity

b.Industrial Tributaties

c.Sewage and Garbage

d.Herbicide and Insecticide

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

a.The theory of comparative advantage

b.The Heckscher-Ohlin theory

c.The theory of absolute advantage

d.The theory of mercantilism

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

a.Diminshing returns to natural resources

b.Rapid labour fore growth

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

d.All of the above

47. What is the benefit of rain water storage?

a.Protection from soil erosion

b.Recharging ground water level

c.Respite from floods

d.Reduce the scarcity of water

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

a.The opinions of international legal experts

b.International Treaties

c.Custom

d.Verdicts of the International Criminal court (ICC)

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

a.Increase resources

b.Increase land erosion

c.Technological improvement

d.reduced inequality

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

a.Heterotrophic zone

b.Schutzdecke zone

c.Autotrophic zone

d.Electrolytic zone

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

a.Variation

b.Harmony

c.Unimited access to resource

d.Homogeneity

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

a.Marxism

b.Critical Theory

c.Realism

d.Liberalism

53. What sort of data describes numerical data?

a.Idiographic

b.Qualitative

c.Nomothetic

d.Quantitive

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

a.Deforestation

b.Ozone depletion

c.The quality of fresh water

d.All of the above

55. Nitrogen oxide affects human health by__________

a.Decreasing blood's ability to transport oxygen

b.Aggravating asthma Problem

c.Causing irritation to the eyes and skin

d.None of the above

56. 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.How the world actually works

c.To produce and consume all goods without trade

d.Globalisation, growing economic linkages among countries

57. Soil colloidal particle shows the phenomena

a.Plasticity

b.All of the above

c.Adhesion and Cohension

d.Flocculation

58. 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.4, 1, 2, 3

b.4, 1, 3, 2

c.1, 4, 3, 2

d.1,4, 2, 3

59. VOC stands for _______________

a.Varying organic components

b.Volatile organic components

c.Virtual organic carriage

d.Viable organic components

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

a.Atomic Power

b.Thermal Power

c.Natural gas

d.Hydro Electric power

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

a.Mixed

b.Tidal Flat

c.Equatorial

d.Monsoon

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

a.2, 3 and 4

b.1 and 3

c.1 and 4

d.1,2 and 4

63. The demographic transition is

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

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

c.None of the above is correct

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

64. 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.Ecological system

b.Local plants

c.Climate

d.Human Resource

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

a.Versatility

b.Survival of the fittest

c.Natural Selection

d.Evolution

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

a.Tomato

b.Potato

c.Onion

d.Corn

67. 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.64

b.32

c.8

d.16

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

a.Human made CO₂ emissions

b.All of the mentioned

c.Industrial CO₂ emissions

d.Natural CO₂ emissions

69. When was the World Wildlife Fund founded?

a.1969

b.1992

c.1961

d.1965

70. EL-Nino is

a.Trophical Disturbance

b.Warm Ocean Current

c.Another name of Typhoon

d.Sea Storm

71. Transportation cost of trade affects:

a.Global supply chains

b.Pattern of trade

c.Boundries bwteen tradable and non-tradable goods

d.All of the above

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

a.They have a different diet

b.The females exclusively mate one gorilla

c.They have a lower level of sexual activity

d.They live in large communities

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

a.Carbon Monoxide

b.Chlorofluorocarbon

c.Freon

d.Carbon Dioxide

74. Quantity of soil to be taken for texture analysis

a.30g

b.40g

c.20g

d.10g

75. What is 'HYV'

a.High yielding variety

b.High yielding crops

c.Higer yeild variety

d.Decreased yielding variety

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

a.Sugar

b.Beef

c.Pork

d.Meat of Goat

77. Cast iron pipes are generally preferred to, because

a.Of longer life

b.Of ease to join

c.All of the above

d.Of moderate cost

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

a.Montreal

b.Italy

c.Toronto

d.London

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

a.Hydrosphere

b.Biosphere

c.Lithosphere

d.Total Wild life

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

a.International Court of Justice (ICJ)

b.International Criminal Court (ICC)

c.Eurpoean Court of Justice (ECJ)

d.Permanent court of International Justice (PCIJ)

81. What was the green revolution based on ?

a.Introduction of new plant varietiees

b.Planting of trees

c.Crop Production

d.Planting more trees

82. 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

83. 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.Mulching

b.Shelter belts

c.Rock dam

d.Contour barriers

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

a.India

b.USA

c.Brazil

d.China

85. Carbonates in water produce

a.Acidity

b.Both a and b

c.Permanent hardness

d.Temporary hardness

86. The concept of survival of the fittest refers to

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

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

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

d.The individuals who work out the most

87. During Inversion:

a.Temperature increases with altitude

b.Temerature decreases with altitudfe

c.Temperature remians constant

d.None of the above

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

a.50,000

b.50 million

c.250,000

d.2.5 Million

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

a.Absorption of carbon dioxide

b.Ecological balance

c.More rain

d.Conservation of wild

90. The cause of reduction of forest coverage is

a.Tourism and Pilgrimage

b.Agriculture

c.Manufacturing Industry

d.Rising Population

91. Environment includes

a.Abiotic Component

b.Oxygen and Nitrogen

c.Biotic component

d.Abiotic and iotic component

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

a.Third Plan

b.Fourth Plan

c.Second Plan

d.First Plan

93. Long path optical measurement uses _____________

a.IR Radiation

b.None of the above

c.Ultraviolet radiation

d.Both a and b

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

a.Reflection

b.Radiation

c.Insolation

d.Refraction

95. Anthropogenic is a _______-

a.Both a and b

b.None to fhe above

c.Natural Environment

d.Modified Environment

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

a.Has fixed exchange rates

b.Has flexible exchange rates

c.Allows private ownership of capital

d.Conducts trade with other countries

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

a.Carbon monoxide

b.Oxygen

c.Water Vapour

d.Chlorofluorocarbon

98. The scope of land reforms does not include-

a.Tenancy reforms

b.Intermediaries removal

c.Land reforms can encompass law

d.All above

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

d.A country claming to own the moon

100. Which of the following is an air pollutant?

a.Carbon Monoxide

b.Oxygen

c.Nitrogen

d.Carbon Dioxide

101. 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.Rock dam

c.Contour barriers

d.Terrace Farming

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

Environment Science MCQ Question Answers for CUET 2025

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