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 of the following is an important Greenhouse Gas?

a.Chlorofluorocarbon

b.Carbon Monoxide

c.Carbon Dioxide

d.Freon

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

a.Unimited access to resource

b.Variation

c.Harmony

d.Homogeneity

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

a.30 ppm

b.10 ppm

c.15 ppm

d.45 ppm

4. During Inversion:

a.Temperature increases with altitude

b.Temerature decreases with altitudfe

c.None of the above

d.Temperature remians constant

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

a.Loss of fertile delta region as for agriculture

b.Increase frequency of hurricanes

c.Decreased rate of photosynthesis in vegetation

d.Shrinking of the polar ice regions

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

a.Lack of political will

b.Shortcoming in legislation

c.All of these

d.poor implementation

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

a.Verdicts of the International Criminal court (ICC)

b.International Treaties

c.Custom

d.The opinions of international legal experts

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

a.Natural gas

b.Thermal Power

c.Atomic Power

d.Hydro Electric power

9. In which year was the Green Revolution started ?

a.1977

b.1980

c.1965

d.1978

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

a.International Court of Justice (ICJ)

b.Eurpoean Court of Justice (ECJ)

c.Permanent court of International Justice (PCIJ)

d.International Criminal Court (ICC)

11. The Earth summit was organised by

a.UNCED

b.UNICEF

c.WHO

d.UNESCO

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

a. To remove parasites from other individuals

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

c.To stimulate sexual activity

d.To reinforce social bonds

13. Anthropogenic is a _______-

a.None to fhe above

b.Modified Environment

c.Both a and b

d.Natural Environment

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

a.Sulphur tetra oxide

b.Sulphur dioxide

c.Ozone

d.Sulphur tera Oxide

15. EL-Nino is

a.Another name of Typhoon

b.Trophical Disturbance

c.Warm Ocean Current

d.Sea Storm

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

a.Water Hyacinth

b.Parthenium

c.Both b and c

d.Elephant Grass

17. What sort of data describes meaning and experience?

a.Quantitive

b.Nomothetic

c.Qualitative

d.Idiographic

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

a.Conducts trade with other countries

b.Allows private ownership of capital

c.Has fixed exchange rates

d.Has flexible exchange rates

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

a.Electrolytic zone

b.Autotrophic zone

c.Heterotrophic zone

d.Schutzdecke zone

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

a.Soil Pollution

b.Thermal Pollution

c.Noise pollution

d.Water Pollution

21. Advantages of green revolution

a. It increases the production of the crops

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

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

22. 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.Contour barriers

d.Rock dam

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

a.Ecological balance

b.More rain

c.Absorption of carbon dioxide

d.Conservation of wild

24. 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.Mulching

b.Intercropping

c.Terrace Farming

d.Rock dam

25. 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

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.Human Resource

b.Climate

c.Ecological system

d.Local plants

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

a.5th June

b.1st December

c.1st October

d.1st May

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

a.Marine Ecosystem

b.Grassland Ecosystem

c.Mountain Ecosystem

d.Desert Ecosystem

29. Which fertiliser produce acidity in soil

a.Calcium ammonium nitrate

b.Sodium nitrate

c.Calcium notrate

d.Ammonium sulphate

30. Which has the maximum rate of deforestation?

a.Northern Forest

b.Temperate Zone

c.Desert Zone

d.Tropical Zone

31. When was the World Wildlife Fund founded?

a.1969

b.1965

c.1992

d.1961

32. Transportation cost of trade affects:

a.Pattern of trade

b.All of the above

c.Global supply chains

d.Boundries bwteen tradable and non-tradable goods

33. The phenomenon slickenside found in which soil

a.Gelisol

b.Vertisol

c.Inceptisol

d.Spodosa

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

a.The theory of absolute advantage

b.The theory of mercantilism

c.The Heckscher-Ohlin theory

d.The theory of comparative advantage

35. The environmental lapse rate is found to be:

a.– 6.5°C/km

b. 6.5°C/km

c. 8.6°C/km

d. 5.6°C/km

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

a.Second Plan

b.Third Plan

c.First Plan

d.Fourth Plan

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

a.Osaka

b.Geneva

c.Florida

d.Montreal

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

a.Beef

b.Pork

c.Sugar

d.Meat of Goat

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

a.Countries will have same relative endowments of production factors

b.Consumers across countries will have identical and homogenous tastes

c.All of the above

d.There will be no distortions or externalities

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

a.Tropical Region

b.Polar Region

c.Rier

d.Desert

41. 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.It increases the production of the crops

c.It decreases the production of the crops

d.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.

42. The Ozone hole over Antarctica was discovered in

a.1978

b.1975

c.1985

d.1987

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

a.Nitrogen

b.Carbon Monoxide

c.Nitrogen Dioxide

d.Carbon Dioxide

44. Altruism can be defined as

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

b.Ensuring that all individuals have equal access to resources

c.Working together for a common goal

d.Buying patronising Band Aid records at Christmas

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

a.Critical Theory

b.Marxism

c.Realism

d.Liberalism

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

a.FALSE

b.Some of the statement is true but not completely

c.Some of the Statement is false but not completely

d.TRUE

47. 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.64

d.32

48. The concept of survival of the fittest refers to

a.The individuals who work out the most

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

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

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

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

a.Herbicide and Insecticide

b.Automobile Laxity

c.Sewage and Garbage

d.Industrial Tributaties

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

a.London

b.Montreal

c.Italy

d.Toronto

51. The air pollutants are mainly classified as____________

a.Point source and non-point source

b.None of the above

c.Primary and secondary pollutants

d.Natural or anthripogennic pollutants

52. Which of the following is an air pollutant?

a.Nitrogen

b.Carbon Dioxide

c.Oxygen

d.Carbon Monoxide

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

a.Onion

b.Tomato

c.Potato

d.Corn

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

a.Industrial CO₂ emissions

b.Human made CO₂ emissions

c.All of the mentioned

d.Natural CO₂ emissions

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

a.Monsoon

b.Mixed

c.Tidal Flat

d.Equatorial

56. Global warming is expected to result in

a.Increase in sea level

b.All of these

c.Change in coastal line

d.Change in crop pattern

57. The yield rates of crops between 1950 and 1998

a.Dramatically increased

b.None of the above

c.Dramitically declined

d.Slighlty declined

58. Land reforms policies in India have met with

a.Complete failure

b.Tremendous success

c.Limited success

d.None of the above

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

a.2.5 Million

b.50 million

c.250,000

d.50,000

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

a.Egocentrism

b.Narcissim

c.Anthropocentrism

d.Ethnocentrism

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

a.Oxidation

b.Hydrolysis

c.Dissolution

d.None of the above

62. 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, 3, 2

d.4, 1, 2, 3

63. VOC stands for _______________

a.Viable organic components

b.Varying organic components

c.Virtual organic carriage

d.Volatile organic components

64. 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%

65. What was the green revolution based on ?

a.Crop Production

b.Planting of trees

c.Introduction of new plant varietiees

d.Planting more trees

66. The scope of land reforms does not include-

a.All above

b.Land reforms can encompass law

c.Tenancy reforms

d.Intermediaries removal

67. Cast iron pipes are generally preferred to, because

a.All of the above

b.Of moderate cost

c.Of ease to join

d.Of longer life

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

a.Product design and quality

b.Product price

c.The introduction of new products

d.All of the above

69. How is comparative advantage defined?

a.To produce and consume all goods without trade

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

c.Globalisation, growing economic linkages among countries

d.How the world actually works

70. Rio Summit is associated with

a.Convention on Biological Diversity

b.Wet Lands

c.Green House Gases

d.Ozone depletion

71. Carbonates in water produce

a.Temporary hardness

b.Both a and b

c.Acidity

d.Permanent hardness

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

a.Lack of clean water

b.Carbon sequestration

c.Biodiversity

d.Winter kill

73. Sustainable development means maximising

a.None of the above

b.The productivity of produced assets

c.Income inequality

d.Economic growth

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

a.Versatility

b.Evolution

c.Natural Selection

d.Survival of the fittest

75. Soil colloidal particle shows the phenomena

a.All of the above

b.Plasticity

c.Adhesion and Cohension

d.Flocculation

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

a.Insolation

b.Refraction

c.Reflection

d.Radiation

77. 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

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

a.Conditions of sunlights

b.Wind

c.Availability of water

d.Temperature variation

79. The largest ecosystem of earth is

a.Lithosphere

b.Hydrospere

c.Biosphere

d.Biome

80. What sort of data describes numerical data?

a.Nomothetic

b.Qualitative

c.Idiographic

d.Quantitive

81. 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 4

c.1 and 3

d.1,2 and 4

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

a.Less than 300 ppm

b.Less than 700 ppm

c.Less than 500 ppm

d.Less than 100 ppm

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

a.Chlorofluorocarbon

b.Water Vapour

c.Oxygen

d.Carbon monoxide

84. 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.Contour barriers

c.Terrace Farming

d.Rock dam

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

a.Increase land erosion

b.Increase resources

c.reduced inequality

d.Technological improvement

86. Quantity of soil to be taken for texture analysis

a.30g

b.10g

c.20g

d.40g

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

a.Brazil

b.India

c.China

d.USA

88. What is the benefit of rain water storage?

a.Respite from floods

b.Protection from soil erosion

c.Recharging ground water level

d.Reduce the scarcity of water

89. 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

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

a.Hydrosphere

b.Total Wild life

c.Biosphere

d.Lithosphere

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

a.None of the above

b.Stack Gases

c.HCI

d.Flue gases

92. The demographic transition is

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

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

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

d.None of the above is correct

93. 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

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

a.Rapid labour fore growth

b.Diminshing returns to natural resources

c.All of the above

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

95. Environment includes

a.Biotic component

b.Abiotic Component

c.Abiotic and iotic component

d.Oxygen and Nitrogen

96. What is 'HYV'

a.Higer yeild variety

b.High yielding variety

c.High yielding crops

d.Decreased yielding variety

97. What are the four factor endowments?

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

b.Types of technology

c.Material inputs used up in the process of production

d.International differences in climate

98. Nitrogen oxide affects human health by__________

a.Decreasing blood's ability to transport oxygen

b.None of the above

c.Aggravating asthma Problem

d.Causing irritation to the eyes and skin

99. Long path optical measurement uses _____________

a.IR Radiation

b.Ultraviolet radiation

c.Both a and b

d.None of the above

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

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

b.A country claming to own the moon

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

d.A disputed National Election

101. The cause of reduction of forest coverage is

a.Manufacturing Industry

b.Tourism and Pilgrimage

c.Rising Population

d.Agriculture

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

Environment Science MCQ Question Answers for CUET 2025

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