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. 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

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

a.Variation

b.Homogeneity

c.Harmony

d.Unimited access to resource

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

a.Chlorofluorocarbon

b.Water Vapour

c.Carbon monoxide

d.Oxygen

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

a.Availability of water

b.Wind

c.Conditions of sunlights

d.Temperature variation

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

a.Sulphur tera Oxide

b.Sulphur dioxide

c.Sulphur tetra oxide

d.Ozone

6. Cast iron pipes are generally preferred to, because

a.Of ease to join

b.Of moderate cost

c.All of the above

d.Of longer life

7. The Earth summit was organised by

a.UNCED

b.UNICEF

c.UNESCO

d.WHO

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

a.Diminshing returns to natural resources

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

c.All of the above

d.Rapid labour fore growth

9. Which fertiliser produce acidity in soil

a.Calcium ammonium nitrate

b.Ammonium sulphate

c.Calcium notrate

d.Sodium nitrate

10. The largest ecosystem of earth is

a.Lithosphere

b.Biosphere

c.Biome

d.Hydrospere

11. Transportation cost of trade affects:

a.Boundries bwteen tradable and non-tradable goods

b.Global supply chains

c.All of the above

d.Pattern of trade

12. The scope of land reforms does not include-

a.Intermediaries removal

b.All above

c.Land reforms can encompass law

d.Tenancy reforms

13. What was the green revolution based on ?

a.Crop Production

b.Introduction of new plant varietiees

c.Planting more trees

d.Planting of trees

14. 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.USA

c.India

d.China

15. Quantity of soil to be taken for texture analysis

a.40g

b.10g

c.30g

d.20g

16. What are the four factor endowments?

a.Material inputs used up in the process of production

b.International differences in climate

c.Types of technology

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

17. 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

18. The Ozone hole over Antarctica was discovered in

a.1975

b.1987

c.1985

d.1978

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

a.Conducts trade with other countries

b.Has fixed exchange rates

c.Allows private ownership of capital

d.Has flexible exchange rates

20. The phenomenon slickenside found in which soil

a.Spodosa

b.Gelisol

c.Inceptisol

d.Vertisol

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

a.Realism

b.Marxism

c.Critical Theory

d.Liberalism

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

a.Water Hyacinth

b.Both b and c

c.Parthenium

d.Elephant Grass

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

a.Sugar

b.Pork

c.Beef

d.Meat of Goat

24. 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

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

a.Toronto

b.London

c.Montreal

d.Italy

26. Long path optical measurement uses _____________

a.IR Radiation

b.Ultraviolet radiation

c.None of the above

d.Both a and b

27. In which year was the Green Revolution started ?

a.1977

b.1980

c.1978

d.1965

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

a.Ozone depletion

b.Deforestation

c.The quality of fresh water

d.All of the above

29. 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.It decreases the production of the crops

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.

30. Nitrogen oxide affects human health by__________

a.None of the above

b.Causing irritation to the eyes and skin

c.Aggravating asthma Problem

d.Decreasing blood's ability to transport oxygen

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

a.15 ppm

b.30 ppm

c.10 ppm

d.45 ppm

32. Which has the maximum rate of deforestation?

a.Tropical Zone

b.Northern Forest

c.Desert Zone

d.Temperate Zone

33. Environment includes

a.Oxygen and Nitrogen

b.Abiotic and iotic component

c.Abiotic Component

d.Biotic component

34. Altruism can be defined as

a.Working together for a common goal

b.Ensuring that all individuals have equal access to resources

c.Buying patronising Band Aid records at Christmas

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

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

a.Thermal Power

b.Atomic Power

c.Hydro Electric power

d.Natural gas

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

a.Autotrophic zone

b.Electrolytic zone

c.Schutzdecke zone

d.Heterotrophic zone

37. 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.64

c.32

d.16

38. What sort of data describes numerical data?

a.Idiographic

b.Nomothetic

c.Qualitative

d.Quantitive

39. Carbonates in water produce

a.Both a and b

b.Temporary hardness

c.Permanent hardness

d.Acidity

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

a.Soil Pollution

b.Thermal Pollution

c.Water Pollution

d.Noise pollution

41. 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

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

a.Onion

b.Corn

c.Tomato

d.Potato

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

a.2.5 Million

b.250,000

c.50 million

d.50,000

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

a.More rain

b.Absorption of carbon dioxide

c.Ecological balance

d.Conservation of wild

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

a.Narcissim

b.Ethnocentrism

c.Anthropocentrism

d.Egocentrism

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

a.1st October

b.1st December

c.1st May

d.5th June

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

a.Dissolution

b.Oxidation

c.None of the above

d.Hydrolysis

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

a.All of the above

b.Countries will have same relative endowments of production factors

c.There will be no distortions or externalities

d.Consumers across countries will have identical and homogenous tastes

49. 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 make them more attractive and hence more likely to get a mate

c.The individuals who work out the most

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

50. Advantages of green revolution

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

b. It increases the production of the crops

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

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.

51. 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.Rock dam

c.Terrace Farming

d.Intercropping

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

a.Sulphur dioxide

b.Carbon Dioxide

c.Carbon monoxide

d.Nitrous dioxide

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

a.Survival of the fittest

b.Evolution

c.Versatility

d.Natural Selection

54. The yield rates of crops between 1950 and 1998

a.Dramitically declined

b.None of the above

c.Dramatically increased

d.Slighlty declined

55. 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.Shrinking of the polar ice regions

d.Loss of fertile delta region as for agriculture

56. When was the World Wildlife Fund founded?

a.1961

b.1969

c.1965

d.1992

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

a.They live in large communities

b.They have a lower level of sexual activity

c.The females exclusively mate one gorilla

d.They have a different diet

58. 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

59. VOC stands for _______________

a.Volatile organic components

b.Varying organic components

c.Viable organic components

d.Virtual organic carriage

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

a.1,2 and 4

b.2, 3 and 4

c.1 and 4

d.1 and 3

61. During Inversion:

a.Temperature remians constant

b.None of the above

c.Temperature increases with altitude

d.Temerature decreases with altitudfe

62. Sustainable development means maximising

a.The productivity of produced assets

b.None of the above

c.Income inequality

d.Economic growth

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

a.Herbicide and Insecticide

b.Industrial Tributaties

c.Automobile Laxity

d.Sewage and Garbage

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

a.All of these

b.poor implementation

c.Shortcoming in legislation

d.Lack of political will

65. The cause of reduction of forest coverage is

a.Manufacturing Industry

b.Tourism and Pilgrimage

c.Agriculture

d.Rising Population

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

a.Lithosphere

b.Biosphere

c.Hydrosphere

d.Total Wild life

67. Anthropogenic is a _______-

a.Modified Environment

b.Natural Environment

c.Both a and b

d.None to fhe above

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

a.Between 15% and 2%

b.More than 2 %

c.Between 1% and 15%

d.Less than 1

69. The environmental lapse rate is found to be:

a. 8.6°C/km

b.– 6.5°C/km

c. 5.6°C/km

d. 6.5°C/km

70. The air pollutants are mainly classified as____________

a.None of the above

b.Point source and non-point source

c.Primary and secondary pollutants

d.Natural or anthripogennic pollutants

71. What is the benefit of rain water storage?

a.Protection from soil erosion

b.Reduce the scarcity of water

c.Respite from floods

d.Recharging ground water level

72. Soil colloidal particle shows the phenomena

a.All of the above

b.Plasticity

c.Adhesion and Cohension

d.Flocculation

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

a.Nitrogen Dioxide

b.Nitrogen

c.Carbon Dioxide

d.Carbon Monoxide

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

a.Some of the Statement is false but not completely

b.Some of the statement is true but not completely

c.TRUE

d.FALSE

75. 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.Local plants

c.Climate

d.Ecological system

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

a.HCI

b.Stack Gases

c.None of the above

d.Flue gases

77. What sort of data describes meaning and experience?

a.Nomothetic

b.Quantitive

c.Idiographic

d.Qualitative

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

a.Reflection

b.Insolation

c.Radiation

d.Refraction

79. Land reforms policies in India have met with

a.Limited success

b.None of the above

c.Complete failure

d.Tremendous success

80. 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)

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

a.Less than 500 ppm

b.Less than 700 ppm

c.Less than 100 ppm

d.Less than 300 ppm

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

a.To reinforce social bonds

b. To remove parasites from other individuals

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

d.To stimulate sexual activity

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

a.Polar Region

b.Tropical Region

c.Rier

d.Desert

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

a.Carbon Dioxide

b.Freon

c.Carbon Monoxide

d.Chlorofluorocarbon

85. 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.How the world actually works

d.Globalisation, growing economic linkages among countries

86. Rio Summit is associated with

a.Green House Gases

b.Ozone depletion

c.Convention on Biological Diversity

d.Wet Lands

87. 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.Mulching

c.Shelter belts

d.Contour barriers

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

a.International Criminal Court (ICC)

b.Permanent court of International Justice (PCIJ)

c.Eurpoean Court of Justice (ECJ)

d.International Court of Justice (ICJ)

89. EL-Nino is

a.Trophical Disturbance

b.Sea Storm

c.Warm Ocean Current

d.Another name of Typhoon

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

a.Florida

b.Montreal

c.Osaka

d.Geneva

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

a.Fourth Plan

b.First Plan

c.Second Plan

d.Third Plan

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

a.All of the mentioned

b.Human made CO₂ emissions

c.Natural CO₂ emissions

d.Industrial CO₂ emissions

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

a.Equatorial

b.Monsoon

c.Mixed

d.Tidal Flat

94. What is 'HYV'

a.High yielding crops

b.Decreased yielding variety

c.Higer yeild variety

d.High yielding variety

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

a.Marine Ecosystem

b.Mountain Ecosystem

c.Desert Ecosystem

d.Grassland Ecosystem

96. 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.Rock dam

b.Contour barriers

c.Mulching

d.Terrace Farming

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

a. Industries that sell to domestic and foreign buyers

b.Import-competing industries

c.Industries in which there are neither imports nor exports

d.Industries that sell to only foreign buyers

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

a.Product design and quality

b.All of the above

c.The introduction of new products

d.Product price

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

a.Increase land erosion

b.Technological improvement

c.Increase resources

d.reduced inequality

100. Which of the following is an air pollutant?

a.Nitrogen

b.Carbon Dioxide

c.Carbon Monoxide

d.Oxygen

101. 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.4, 1, 3, 2

c.4, 1, 2, 3

d.1, 4, 3, 2

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

Environment Science MCQ Question Answers for CUET 2025

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