Practice Environment & Biodiversity MCQ Questions 1–25 out of 48. Free quiz with answers and explanations for UPSC, SSC, Railway exam preparation. Secure vital marks in the ecology segment with our curated Environment and Biodiversity GK mock test. This dynamic module provides rigorous practice on climate change protocols, national global warming initiatives, ecosystems, endangered species, international treaties, and environmental protection acts.
Which international treaty/agreement negotiated in 1987 specifically aims to protect the ozone layer by phasing out ozone-depleting substances?
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Explanation
The Montreal Protocol on Substances that Deplete the Ozone Layer is an international treaty designed in 1987. It successfully orchestrated global phase-out of harmful chlorofluorocarbons (CFCs). [Memory Trick: Protect the ozone shell to prevent the Earth from getting warm and 'Melting'= 'Montreal' Protocol.]
2
What is the phenomenon called where the concentration of toxic substances (like DDT) increases at higher levels of a food chain?
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Explanation
Biomagnification or biological magnification is the accumulation and concentration of non-biodegradable toxins sequentially upwards in food web, severely impacting top predators like eagles. [Memory Trick: As toxins travel up the chain, their danger gets 'Magnified' (bigger) = 'Biomagnification'.]
3
In which year was 'Project Tiger', a major conservation initiative to rescue Indian Tigers from extinction, officially launched?
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Explanation
Project Tiger was launched on April 1, 1973, from Jim Corbett National Park during Indira Gandhi's tenure. It designated national tiger reserves to create controlled ecosystems for the endangered species. [Memory Trick: The Tiger has 'three' strip marks (3) in his forehead which saved his life in '73 = 1973.]
4
The global 'Ramsar Convention', which drives international cooperation for wetland conservation, was signed in Ramsar, Iran, in which year?
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Explanation
The Ramsar Convention on Wetlands of International Importance was signed in 1971 in the Iranian city of Ramsar. February 2nd is celebrated globally as World Wetlands Day to mark this. [Memory Trick: Safeguard birds and marshy lands where 'Ram' drank water in '71 = 1971.]
5
What is the major ecological consequence of agricultural runoff causing nutrient enrichment (nitrogen/phosphorus) in water systems?
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Explanation
Eutrophication occurs when excess nutrients cause dense algal blooms, depleting dissolved oxygen as algae decay, suffocating fish and creating aquatic dead zones. [Memory Trick: Excess nutrients lead to algae growth, blocking light so fish say 'You suffocated me' = 'Eu'-trophication.]
6
Minamata disease, a neurological syndrome characterized by severe mercury poisoning, was first discovered in which country in 1956?
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Explanation
Minamata disease was caused by the release of methylmercury in industrial wastewater into Minamata Bay in Japan, accumulating in fish and shellfish eaten by local populations. [Memory Trick: 'Minamata' sounds like a beautiful eastern name from 'Japan'.]
7
The Kyoto Protocol, which set binding targets for industrialized nations to reduce greenhouse gas emissions, was adopted in which year?
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Explanation
The Kyoto Protocol was adopted in Kyoto, Japan, in December 1997 and entered into force in 2005. It operationalized the UNFCCC by committing industrialized countries to limit emissions. [Memory Trick: Kyoto Protocol was set up in '97' because 'Greenhouses' make nine-seven look fine.]
8
The Stockholm Convention, a global treaty designed to protect human health and the environment, targets which of the following pollutants?
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Explanation
Adopted in 2001, the Stockholm Convention focuses on eliminating or restricting the production and use of Persistent Organic Pollutants (POPs), which persist in the environment and bioaccumulate. [Memory Trick: POPs stick around too long in the 'Stock' room of nature = Stockholm targets POPs.]
9
The historic Earth Summit, which adopted 'Agenda 21' as a global blueprint for sustainable development, was held in 1992 in which city?
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Explanation
The United Nations Conference on Environment and Development (UNCED), also known as the Earth Summit, took place in Rio de Janeiro, Brazil, in 1992, giving rise to the CBD, UNFCCC, and Agenda 21. [Memory Trick: We reached the grand 'Rio' bay to design a sustainable 'Agenda' for the earth.]
10
The famous Silent Valley Movement, aimed at protecting a pristine evergreen forest from being flooded by a hydroelectric project, took place in which Indian state?
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Explanation
The Silent Valley Movement (1973–1983) was a social movement in Kerala to save the Silent Valley Reserve Forest from a hydroelectric project across the Kunthipuzha River, protecting the endangered lion-tailed macaque. [Memory Trick: Best to keep nature 'Silent' and peaceful in 'Kerala's' lush green backwaters.]
11
Who was the legendary environmentalist who led the 'Chipko Movement' in Uttarakhand to prevent trees from being felled by hugging them?
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Explanation
Sunderlal Bahuguna was a pioneering environmentalist who led the Chipko Movement in the 1970s. He coined the slogan: 'Ecology is permanent economy' and successfully lobbied to ban tree felling in the Himalayas. [Memory Trick: Tree-hugging makes the forest 'Sunder' (beautiful) and brings 'Bahuguna' (many benefits).]
12
Inspired by the Himalayan Chipko Movement, the 'Appiko Movement' was launched in 1983 to protect forests in which state?
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Explanation
The Appiko Movement was started in September 1983 by villagers of Salkani in Sirsi district, Karnataka, to protest against commercial logging and monoculture in the Western Ghats. [Memory Trick: 'Appi' translates to 'hug' in Kannada, the state language of 'Karnataka'.]
13
The Central Pollution Control Board (CPCB) of India is a statutory organization established in 1974 under which legislation?
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Explanation
The CPCB was constituted in September 1974 under the Water (Prevention and Control of Pollution) Act, 1974. It was later entrusted with powers and functions under the Air Act, 1981. [Memory Trick: Water flows first, so the CPCB was born inside the 'Water' Act flow.]
14
The National Green Tribunal (NGT) of India was established in 2010 to provide speedy justice in environmental cases. Its principal bench is located in which city?
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Explanation
The NGT was established under the NGT Act 2010 for effective disposal of cases relating to environmental protection. Its principal bench is in New Delhi, with regional benches in Bhopal, Pune, Kolkata, and Chennai. [Memory Trick: The green 'Tribunal' sits in the capital 'New Delhi' to guard the country's environmental rules.]
15
Which international organization maintains and publishes the 'Red List' of threatened species globally?
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Explanation
The International Union for Conservation of Nature (IUCN), founded in 1948 and headquartered in Gland, Switzerland, compiles the Red List which evaluates the conservation status of plant and animal species worldwide. [Memory Trick: 'I-U-C-N' = International Union that 'Cares' for species in the Red Zone.]
16
Which of the following geographical regions in India is recognized as a global 'Biodiversity Hotspot'?
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Explanation
India has four biodiversity hotspots: the Himalayas, the Western Ghats, the Indo-Burma region, and Sundaland. The Western Ghats run along the western coast and are exceptionally rich in endemic flora and fauna. [Memory Trick: Water and clouds hit the 'Ghats' to create a steaming 'Hotspot' of wildlife.]
17
The Wildlife Protection Act, which provides the legal framework for protecting wild animals, birds, and plants in India, was enacted in which year?
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Explanation
The Wildlife Protection Act was passed in 1972. It contains six schedules that accord varying degrees of protection, with Schedule I providing absolute protection and the highest penalties. [Memory Trick: We protected the 'Wildlife' in '72' (Seventy-Two) before launching the Tiger project next.]
18
Which Indian environmental legislation is famously known as the 'Umbrella Act' because of its wide-ranging powers to coordinate various central and state activities?
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Explanation
The Environment (Protection) Act, 1986, was enacted under Article 253 of the Constitution in the wake of the 1984 Bhopal Gas Tragedy. It serves as an umbrella legislation to manage overall environment policy. [Memory Trick: An 'umbrella' protects us from acid rain, just like the 'Protection' Act of '86' shields all ecology.]
19
In 1987, noise pollution was formally added as a pollutant under which section of India's environmental laws?
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Explanation
The Air (Prevention and Control of Pollution) Act was enacted in 1981. It was amended in 1987 to include 'noise' under the definition of air pollutants. [Memory Trick: Loud noise travels through the 'Air', hurting our ears in '87.]
20
Under the Water (Prevention and Control of Pollution) Act, 1974, what is the minimum duration of the term of office for a member of the State Pollution Control Board?
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Explanation
Members of the Central and State Pollution Control Boards hold office for a term of three years from the date of their nomination. [Memory Trick: SPCB officers serve a neat term of 'Three' (3) years to clear the liquid waste.]
21
The Biological Diversity Act of India was enacted in 2002 to meet the obligations of which international treaty?
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Explanation
The Biological Diversity Act, 2002, was passed to realize the objectives of the United Nations Convention on Biological Diversity (CBD) signed in 1992, promoting conservation and fair benefit sharing. [Memory Trick: Clean 'Diversity' Act in '2002' matches the CBD goals perfect and true.]
22
Which of the following was established as India's very first National Park in the year 1936?
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Explanation
Established in 1936 as Hailey National Park in Uttarakhand, it was later renamed Ramganga National Park, and finally Jim Corbett National Park to honor the legendary naturalist and author. [Memory Trick: The 'First' hunter-turned-saver 'Jim' placed his 'Corbett' park at the top in '1936'.]
23
Which is the world's only floating national park, located on Loktak Lake in Northeast India?
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Explanation
Keibul Lamjao National Park in Manipur is famous for its floating decomposed plant material called 'phumdis' and is the last natural refuge of the endangered Eld's deer or Sangai (brow-antlered deer). [Memory Trick: You need strong 'Cable' (Keibul) locks to hold a 'floating' park on a lake!]
24
Gahirmatha Marine Sanctuary in Odisha is world-famous as the largest nesting ground for which endangered marine species?
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Explanation
Gahirmatha beach in Odisha is the world's most important nesting beach for Olive Ridley turtles, which gather in thousands for mass nesting known as 'Arribada'. [Memory Trick: Millions of 'Olive' turtles swim across 'Gahirmatha' (deep waters) for their beach party.]
25
The Paris Agreement on Climate Change, adopted at COP21, aims to limit global temperature rise in this century to well below how many degrees Celsius?
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Explanation
The Paris Agreement (2015) aims to keep global temperature rise in this century well below 2.0 °C above pre-industrial levels, while pursuing efforts to limit it to 1.5 °C. [Memory Trick: Keep it below 'Two' (2) degrees or things will get too hot for me and you.]