Most important MCQs on Environmental Science 2023

Rate this post

In a world increasingly concerned about the health of our planet, environmental science plays a pivotal role in understanding and addressing the challenges facing our natural environment. Here’s a short note on the fascinating field of environmental science:

Environmental science is a multidisciplinary field that explores the intricate web of interactions between living organisms and their surroundings. It delves into various aspects of the environment, from the air we breathe to the ecosystems that sustain life on Earth.

Most important MCQs on Environmental Science 2023 Practice Now

Key Points:

  1. Interconnected Systems: Environmental scientists study the Earth as a complex system where everything is interconnected. This holistic approach helps us comprehend the consequences of human activities on the environment.
  2. Climate Change: One of the most pressing issues in environmental science is climate change. Scientists investigate the causes, effects, and mitigation strategies for this global crisis, emphasizing the importance of reducing greenhouse gas emissions.
  3. Biodiversity Conservation: Environmental scientists work tirelessly to protect the Earth’s biodiversity. They explore ways to preserve endangered species, maintain healthy ecosystems, and combat threats like habitat loss and poaching.
  4. Resource Management: Sustainable resource management is vital for the long-term health of our planet. Environmental scientists study how we can responsibly use and conserve natural resources such as water, forests, and minerals.
  5. Pollution Control: They also focus on reducing pollution in all its forms, from air and water pollution to plastic waste. Innovative solutions, like cleaner technologies and waste reduction initiatives, are part of their toolbox.
  6. Renewable Energy: With the growing demand for energy, environmental scientists are at the forefront of researching and promoting renewable energy sources like solar, wind, and hydropower.
  7. Environmental Education: Environmental science promotes awareness and education about environmental issues. It empowers individuals and communities to make informed choices that benefit the planet.
  8. Policy and Advocacy: Environmental scientists often collaborate with policymakers and advocacy groups to influence decisions that can impact the environment positively.

Environmental science is the key to understanding, preserving, and improving the health of our planet. It is a dynamic field that continuously evolves as we face new environmental challenges. By studying and applying the principles of environmental science, we can work towards a more sustainable and harmonious coexistence with our natural world.


 Prepare for success in competitive exams by accessing a curated selection of exam-specific books available for purchase online through our dedicated link, empowering you to study smarter and achieve your goals

Most important MCQs on Environmental Science 2023

Q1. Which of the following is not related to environmental  protection?

(a) Sustainable Development   

(b) Poverty Alleviation

(c) Air Conditioning   

(d) Use of Paper Bags

(b) Poverty Alleviation

Q2. The Environment (Protection) Act of India was enacted  in

(a) 1981 

(b) 1986

(c) 1995 

(d) 2000

(b) 1986

Q3. Environment is a composite state of 

(a) Biotic factors 

(b) Physiographic factors  

(c) Abiotic factors  

(d) All of the above

(d) All of the above

Q4. Environment can be classified as following  categories. Which among the following is NOT a part  of such a category?

(a) Operational Environment

(b) Physical Environment  

(c) Cultural Environment  

(d) Biological Environment

(a) Operational Environment

Q5. What is blue carbon?

(a) Carbon captured by oceans and coastal ecosystems 

(b) Carbon sequestered in forest biomass and agricultural  soils  

(c) Carbon contained in petroleum and natural gas  

(d) Carbon present in atmosphere

(a) Carbon captured by oceans and coastal ecosystems

Q6. World Environment Day is celebrated on:

(a) 21 March 

(b) 23 September  

(c) 5 June

(d) 25 May

(c) 5 June

Q7. The main role of solar radiation is in 

(a) Carbon cycle 

(b) Hydrogen cycle  

(c) Water cycle

(d) Nitrogen cycle

(c) Water cycle

Q8. National Environmental Engineering Research  Institute is situated at:

(a) Bengaluru 

(b) Hyderabad  

(c) Nagpur

(d) New Delhi

(c) Nagpur

Q9. When and where the National Environment Engineering  Research Institute (NEERI) was established?

(a) 1970, Dhanbad 

(b) 1958, Nagpur

(c) 1956 ,New Delhi 

(d) 1960, Chennai

(b) 1958, Nagpur

Q10. ‘Earth Summit’ was held at:

(a) Cairo 

(b) Rio-de-Janeiro

(c) Durban 

(d) Kyoto

(b) Rio-de-Janeiro

Q11. What is the thin layer of gases around the earth called?

(a) Biosphere  

(b) Water particle 

(c) Atmosphere

(d)  Hydrosphere

(c) Atmosphere

Q12. Air is a/an:

(a) Compound 

(b) Element  

(c) Mixture

(d) Electrolyte

(c) Mixture

Q13. In the atmosphere, the highest percentage is of:

(a) Oxygen 

(b) Carbon dioxide 

(c) Nitrogen

(d) Hydrogen

(c) Nitrogen

Q14. The concept of weathering relates to

(a) Deposition of decomposed material  

(b) Change in weather conditions day to day  

(c) Natural process leading to the decomposition of rocks

(d) None of the above

(c) Natural process leading to the decomposition of rocks

Q15. The Headquarter of the World Meteorological Organization  is located at –  (a) Geneva

(b) Rome   

(c) Sidney  

(d) Tokyo

(a) Geneva

Q16. Where is the headquarters of the United Nations  Environment Programme (UNEP)?

(a) The Hague 

(b) Nairobi  

(c) New York 

(d) Washington D.C

(b) Nairobi

Q17. What does EPA stand for 

(a) Environment Pollution Agency 

(b) Environmental Prohibition Agency 

(c) Environment Protection Agency

(d) None of these

(c) Environment Protection Agency

Q18. N.E.A. Stands for:

(a) National Enquiry Act 

(b) National Environment Authority

(c) National Examination Agency

(d) National Event Association

(c) National Examination Agency

Q19. The headquarters of the Green Peace International  is located at 

(a) Amsterdam

(b) Canberra 

(c) Ottawa 

(d) Nagasaki

(a) Amsterdam

Q20. To label environment-friendly consumer products, the  Government has introduced:

(a) Agmark 

(b) Eco mark

(c) ISI Mark 

(d) Watermark

(b) Eco mark

Q21. Environmental degradation means

(a) Overall degradation of environmental attributes

(b) Adverse changes brought in by human activities

(c) Ecological imbalance because of ecological diversity

(d) All the above

(d) All the above

Q22. What is the primary greenhouse gas responsible for global warming?

a) Carbon dioxide (CO2)

b) Oxygen (O2)

c) Nitrogen (N2)

d) Methane (CH4)

a) Carbon dioxide (CO2)

Q23. Which layer of the Earth’s atmosphere contains the ozone layer?

a) Troposphere

b) Stratosphere

c) Mesosphere

d) Thermosphere

b) Stratosphere

Q24. What is the term for the gradual increase in Earth’s average temperature due to human activities?

a) Global cooling

b) Climate change

c) Greenhouse effect

d) Ozone depletion

b) Climate change

Q25. Which international agreement aims to combat climate change by reducing greenhouse gas emissions?

a) Paris Agreement

b) Kyoto Protocol

c) Rio Declaration

d) Copenhagen Accord

a) Paris Agreement

Q26. What is the term for the variety of life on Earth, including the diversity of species and ecosystems?

a) Sustainability

b) Ecology

c) Biodiversity

d) Conservation

c) Biodiversity

Q27. Which of the following is a major cause of soil erosion?

a) Reforestation

b) Urbanization

c) Organic farming

d) Desertification

b) Urbanization

Q28. Which gas is responsible for the depletion of the ozone layer?

a) Oxygen (O2)

b) Carbon dioxide (CO2)

c) Chlorofluorocarbons (CFCs)

d) Nitrogen (N2)

c) Chlorofluorocarbons (CFCs)

Q29. What is the largest source of marine pollution?

a) Oil spills

b) Plastic waste

c) Sewage discharge

d) Heavy metals

b) Plastic waste

Q30. Which natural disaster is often linked to deforestation and heavy rainfall?

a) Tornadoes

b) Earthquakes

c) Hurricanes

d) Landslides

d) Landslides

Q31. Which of the following is an example of a non-point source of water pollution?

a) Factory discharge pipe

b) Sewage treatment plant

c) Pesticide runoff from a farm field

d) Oil spill from a tanker

c) Pesticide runoff from a farm field

Q32. What is the primary cause of coral bleaching?

a) Overfishing

b) Increased water temperature

c) Pollution

d) Ocean acidification

b) Increased water temperature

Q33. What is the main driver of habitat loss and species extinction?

a) Pollution

b) Climate change

c) Habitat destruction

d) Overfishing

c) Habitat destruction

Q34. Which type of pollution is caused by the release of harmful chemicals into the air, water, or soil?

a) Thermal pollution

b) Noise pollution

c) Chemical pollution

d) Light pollution

c) Chemical pollution

Q35.Which renewable energy source relies on the heat stored in the Earth’s interior?

a) Wind energy

b) Solar power

c) Geothermal energy

d) Hydroelectric energy

c) Geothermal energy

Q36. Which of the following is a key factor contributing to the loss of biodiversity?

a) Protected wildlife reserves

b) Habitat preservation

c) Invasive species

d) Conservation efforts

c) Invasive species

Q37. Which gas is primarily responsible for the formation of smog in urban areas?

a) Oxygen (O2)

b) Nitrogen (N2)

c) Carbon dioxide (CO2)

d) Sulphur dioxide (SO2)

d) Sulphur dioxide (SO2)

Q38. What is the term for the process of using living organisms to clean up environmental pollution?

a) Bioremediation

b) Deforestation

c) Erosion control

d) Solar remediation

a) Bioremediation

Q39. What is the term for the loss of a species from a particular habitat or from the entire planet?

a) Extinction

b) Endangerment

c) Overpopulation

d) Migration

a) Extinction

Q40. Which oceanic phenomenon refers to the periodic warming of sea surface temperatures in the central and eastern Pacific Ocean?

a) El Niño

b) La Niña

c) Typhoon

d) Tornado

a) El Niño
https://youtu.be/4Bl6yNh14fQ?si=Yf7XtQV_USp6vOR8

What is Environmental Science?

Environmental science is a multidisciplinary field that studies the interactions between living organisms and their environment. It explores the Earth’s ecosystems, natural resources, pollution, climate change, and ways to sustainably manage and protect our planet

Why is Environmental Science Important?

Environmental science is crucial because it helps us understand the environmental challenges we face, such as pollution, climate change, and biodiversity loss. It provides the knowledge and tools needed to address these issues and ensure a sustainable future for generations to come

How Does Environmental Science Contribute to Solving Environmental Problems?

Environmental scientists conduct research to identify the root causes of environmental problems, develop solutions, and advocate for policies and practices that mitigate these issues. Their work informs decision-makers and empowers individuals to make environmentally responsible choices.

What Are the Major Environmental Concerns Today?

Some of the major environmental concerns include climate change due to greenhouse gas emissions, loss of biodiversity and habitat destruction, air and water pollution, deforestation, overexploitation of natural resources, and the accumulation of plastic waste in ecosystems.

What Can Individuals Do to Help the Environment?

Individuals can make a significant impact by adopting eco-friendly practices such as reducing energy consumption, conserving water, recycling, reducing waste, supporting sustainable products and practices, and advocating for environmentally responsible policies in their communities.

Leave a Comment