Environmental Science MCQ – Asked in Previous Years, WBCS Mains

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Q191. The average per capita municipal solid waste generated per day in India is up to –
A. 100g
B. 200g
C. 300g
D. 500g

Answer – D. 500g
Explanation-The average per capita municipal solid waste generated per day in India can vary across regions and cities. However, the estimation of up to 500 grams (0.5 kilograms) is a common approximation. It is important to note that waste generation rates can vary based on population density, urbanization levels, lifestyle patterns, and waste management practices in different areas.


Q192. The Abyssal Zone is at a depth of ____
A. 1000-2000 m
B. 2000-4000 m
C. 4000-6000 m
D. 6000-8000 m

Answer – C. 4000-6000 m
Explanation-The Abyssal Zone refers to the deepest part of the ocean, which is typically found at depths ranging from 4000 to 6000 meters (4 to 6 kilometers). It is the region beyond the continental slope where the ocean floor becomes relatively flat and deep. The Abyssal Zone is characterized by extreme darkness, high pressure, and cold temperatures. It supports unique and diverse ecosystems adapted to the harsh conditions of the deep sea.


Q193. The Gulf of Mannar Biosphere Reserve was mainly created to protect –
A. Coral reef
B. Seahorses
C. Sea cucumber
D. All of the above

Answer – D. All of the above
Explanation-The Gulf of Mannar Biosphere Reserve, located along the southeastern coast of India, was mainly created to protect various marine ecosystems and species. It encompasses diverse habitats, including coral reefs, seagrass meadows, mangrove forests, and associated marine life. The reserve aims to conserve the rich biodiversity of the Gulf of Mannar, which includes coral reefs, seahorses, sea cucumbers, and numerous other marine species.


Q194. Bioplastic is mostly produced from ______
A. Bacteria
B. Algae
C. Fungi
D. Protozoa

Answer – B. Algae
Explanation-Bioplastics can be produced from various renewable resources, including bacteria, fungi, and algae. However, algae-based bioplastics have gained significant attention due to their high growth rate, ability to grow in diverse environments, and potential for sustainable production. Algae contain valuable biopolymers, such as polysaccharides and lipids, which can be used as feedstock for bioplastic production. Algae-based bioplastics offer a more sustainable and environmentally friendly alternative to conventional plastics derived from fossil fuels.


Q195. The Man and Biosphere program was undertaken in-
A. 1971
B. 1973
C. 1975
D. 1980

Answer – C. 1975
Explanation-The Man and Biosphere (MAB) program was undertaken in 1975. It is an intergovernmental scientific program initiated by UNESCO (United Nations Educational, Scientific and Cultural Organization) to promote the sustainable use and conservation of biodiversity and ecosystems. The program aims to establish a network of biosphere reserves that serve as sites for research, monitoring, and sustainable development practices.


Q196. Arabari Model is representing-
A. Social forestry
B. Joint forestry
C. Sustainable forestry
D. Farm Forestry

Answer – B. Joint forestry
Explanation-The Arabari Model represents Joint Forestry. It is a successful community-based forestry model implemented in the Arabari Forest Range of West Bengal, India. Under this model, local communities actively participate in the management and protection of forests. Joint Forest Management (JFM) committees comprising local villagers and forest department officials work together to conserve and sustainably utilize forest resources, while also improving local livelihoods.


Q197. What is meant by disaster mitigation?
A. Planning how to respond to a disaster
B. Returning the community to normal conditions
C. Taking immediate measures to save life and property
D. Minimizing the possible effects of a disaster

Answer – D. Minimizing the possible effects of a disaster
Explanation-Disaster mitigation refers to the actions and measures taken to minimize the possible effects of a disaster. It involves proactive steps to reduce the vulnerability of communities and infrastructure to natural or man-made disasters. This includes implementing preventive measures, such as early warning systems, infrastructure design, land-use planning, and public awareness campaigns, to reduce the impact and severity of disasters.


Q198. Hydrogen from seawater was first introduced-
A. Spain
B. Italy
C. Finland
D. Iceland

Answer – B. Italy
Explanation-The process of extracting hydrogen from seawater, known as seawater electrolysis, was first introduced in Italy. The development of this technology involved using electrolysis to split water molecules into hydrogen and oxygen gases. This innovation has the potential to provide a sustainable and renewable source of hydrogen fuel, as seawater is abundant and does not deplete natural freshwater resources.


Q199. The following is not a biosphere reserve in India-
A. Gulf of Mannar
B. Nanda Devi
C. Bhitarkanika
D. Sundarbans

Answer – C. Bhitarkanika
Explanation-Bhitarkanika is not a biosphere reserve in India. However, it is a national park and wildlife sanctuary located in Odisha, India. The biosphere reserves in India include Gulf of Mannar, Nanda Devi, and Sundarbans. Biosphere reserves are designated areas that aim to conserve biodiversity, promote sustainable development, and provide a platform for research and monitoring of ecosystems.


Q200. WCED (World Commission on Environment and Development) report is also called-
A. On the common enemy
B. Silent Spring
C. Our common goal
D. Our common future

Answer – D. Our common future
Explanation-The WCED (World Commission on Environment and Development) report is also called “Our Common Future.” The report, published in 1987, was a landmark publication by the United Nations that introduced the concept of sustainable development. It highlighted the interconnectedness of environmental protection, social equity, and economic development, emphasizing the need for global cooperation and long-term planning to address environmental challenges.


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