Hey there! If you’re preparing for the JKSSB or any other competitive exam, you know how crucial the environment section is. It’s not just about memorizing facts; it’s about understanding the world around us. I remember when I was studying for my own exams, this topic felt overwhelming. But breaking it down into clear, testable concepts made all the difference.
Below, I’ve put together a set of 25 key multiple-choice questions that cover the core “Environment (General Issues)” syllabus. I’ve included detailed explanations, not just answers, because I believe knowing the ‘why’ helps you remember the ‘what’ and apply it to new questions. Think of this as a focused practice session we’re doing together.
Environment (General Issues): Key Practice Questions for JKSSB Exams
Let’s dive in. Read each question carefully, try to answer it yourself, and then check the explanation to solidify your understanding.
Atmosphere and Climate Change
Q1. Which of the following is considered a primary greenhouse gas responsible for global warming?
- (a) Oxygen
- (b) Nitrogen
- (c) Methane
- (d) Argon
Answer: (c) Methane
Explanation: While carbon dioxide (CO₂) is the most discussed, methane (CH₄) is a powerhouse greenhouse gas. It’s actually over 25 times more effective at trapping heat in the atmosphere than CO₂ over a 100-year period. It comes from sources like agriculture (livestock), landfills, and fossil fuel extraction.
Q2. The thinning of the Ozone layer is primarily attributed to:
- (a) Carbon dioxide
- (b) Sulphur dioxide
- (c) Chlorofluorocarbons (CFCs)
- (d) Nitrogen oxides
Answer: (c) Chlorofluorocarbons (CFCs)
Explanation: This is a classic example of a global environmental problem with a successful policy response. CFCs, once common in refrigerants and aerosols, release chlorine atoms in the upper atmosphere. A single chlorine atom can destroy thousands of ozone molecules, leading to the “ozone hole.” The Montreal Protocol was created to phase them out.
Q12. The term ‘Greenhouse Effect’ refers to:
- (a) The cooling of Earth’s surface due to extensive forest cover
- (b) The warming of Earth’s surface and atmosphere due to trapped solar radiation
- (c) The effect of gardening on urban environments
- (d) The process of growing plants in transparent structures
Answer: (b)
Explanation: It’s essential to understand that the Greenhouse Effect is a natural and necessary process—without it, Earth would be too cold to support life. The issue is the enhanced greenhouse effect, where human activities are adding extra greenhouse gases, trapping more heat and causing global warming.
Q17. The gradual increase in the average temperature of the Earth’s atmosphere and its oceans is known as:
- (a) Climate variability
- (b) Global warming
- (c) Ice age
- (d) Weather forecasting
Answer: (b) Global warming
Explanation: “Global warming” specifically refers to the long-term trend of rising average temperatures. “Climate change” is a broader term that includes warming but also encompasses its side effects, like more extreme weather events, shifting rainfall patterns, and sea-level rise.
Pollution and Its Impacts
Q3. What is the main cause of ‘acid rain’?
- (a) Emission of methane and carbon dioxide
- (b) Emission of sulphur dioxide and nitrogen oxides
- (c) Emission of oxygen and hydrogen
- (d) Emission of CFCs and halons
Answer: (b)
Explanation: These gases primarily come from burning fossil fuels in power plants and vehicles. When they mix with water vapor in the atmosphere, they form sulfuric and nitric acids, which fall as rain, snow, or fog. I’ve seen its effects firsthand on historical monuments, where it accelerates weathering and erosion.
Q5. The term ‘Smog’ is derived from a combination of which two words?
- (a) Smoke and Fog
- (b) Snow and Log
- (c) Sand and Dust
- (d) Sea and Cloud
Answer: (a) Smoke and Fog
Explanation: Originally describing a mix of smoke and fog from coal burning (like the classic “London smog”), the term now often refers to photochemical smog—a brown haze formed when sunlight reacts with pollutants like nitrogen oxides and volatile organic compounds from vehicle exhaust.
Q6. Which of the following is an example of an anthropogenic source of pollution?
- (a) Volcanic eruption
- (b) Forest fire caused by lightning
- (c) Industrial effluent discharge
- (d) Dust storms
Answer: (c) Industrial effluent discharge
Explanation: “Anthropogenic” simply means human-caused. Distinguishing between natural and human-made sources is key in environmental science, as our focus for regulation and solution is primarily on the latter.
Q10. The phenomenon where an increase in nutrients leads to excessive algae growth in a water body is called:
- (a) Salinization
- (b) Eutrophication
- (c) Desertification
- (d) Bioremediation
Answer: (b) Eutrophication
Explanation: This is often caused by runoff from agricultural fertilizers or untreated sewage. The algae bloom blocks sunlight and, when it dies, its decomposition consumes oxygen, creating “dead zones” where fish and other aquatic life can’t survive.
Q14. Which disease is linked to water contaminated with excess nitrates?
- (a) Goitre
- (b) Blue Baby Syndrome (Methemoglobinemia)
- (c) Jaundice
- (d) Malaria
Answer: (b) Blue Baby Syndrome
Explanation: This is a critical public health link. Nitrates from fertilizers can seep into groundwater. When infants drink this water, it can interfere with their blood’s ability to carry oxygen, leading to a serious condition. It underscores why protecting water sources is non-negotiable.
Q21. The accumulation of toxic substances in organisms at higher trophic levels is called:
- (a) Eutrophication
- (b) Biomagnification
- (c) Bioremediation
- (d) Photosynthesis
Answer: (b) Biomagnification
Explanation: This is why top predators like eagles or sharks often have high levels of toxins like DDT or mercury. The toxin doesn’t get broken down or excreted easily, so it becomes more concentrated in the tissues of each successive consumer in the food chain.
Biodiversity and Conservation
Q4. Biodiversity refers to the variety of life. Which level is NOT included?
- (a) Genetic diversity
- (b) Species diversity
- (c) Ecosystem diversity
- (d) Industrial diversity
Answer: (d) Industrial diversity
Explanation: Biodiversity is a hierarchy: genes within a population (genetic), different species in a forest (species), and different habitats like forests, wetlands, and grasslands (ecosystem). Industrial diversity is an economic term.
Q7. The ‘Chipko Movement’ in India is primarily associated with:
- (a) Water resources
- (b) Wildlife
- (c) Forests
- (d) Soil
Answer: (c) Forests
Explanation: This grassroots movement from the 1970s, where villagers (especially women) hugged trees to prevent logging, is a landmark in Indian environmental history. It highlights the deep connection between community welfare and forest conservation.
Q15. The ‘Wildlife Protection Act’ in India was enacted in which year?
- (a) 1970
- (b) 1972
- (c) 1980
- (d) 1986
Answer: (b) 1972
Explanation: This is a fundamental piece of legislation. Enacted in 1972, it provides the legal framework for the protection of listed species of wild animals and plants, and the establishment of protected areas like national parks and sanctuaries.
Q16. What is the primary function of a ‘National Park’?
- (a) To provide recreational facilities for tourists
- (b) To protect and preserve an area’s natural environment and wildlife
- (c) To serve as a buffer zone for industrial development
- (d) To promote agricultural activities
Answer: (b)
Explanation: While tourism and education are allowed, the core mandate is strict conservation. Human activity is highly regulated. Compare this to a Sanctuary, where some private rights may exist, or a Biosphere Reserve, which includes a core zone, buffer zone, and transition zone for sustainable development.
Q19. What is the primary characteristic of an ‘Endemic Species’?
- (a) A species found worldwide
- (b) A species that is highly migratory
- (c) A species found only in a specific geographical area
- (d) A species that can adapt to any environment
Answer: (c)
Explanation: Endemic species are uniquely vulnerable. Think of the snow leopard in the Himalayas or the Lion-tailed Macaque in the Western Ghats. If their specific habitat is destroyed, they have nowhere else to go, making them a high priority for conservation.
Q23. The ‘Red Data Book’ published by IUCN provides information on:
- (a) Sustainable development projects
- (b) Endangered species of plants and animals
- (c) Geological formations
- (d) Average global temperatures
Answer: (b) Endangered species
Explanation: The IUCN Red List is the world’s most comprehensive inventory of the global conservation status of species. It uses categories like Critically Endangered, Endangered, and Vulnerable to prioritize conservation action.
Concepts, Laws, and Movements
Q8. What does ‘Ecology’ fundamentally study?
- (a) The economics of natural resources
- (b) The study of Earth’s atmosphere
- (c) The interactions between living organisms and their environment
- (d) The chemical composition of rocks
Answer: (c)
Explanation: Ecology is the foundational science for all environmental studies. It looks at relationships—between a bee and a flower, a predator and its prey, or a forest and the local climate.
Q9. Which international agreement aims to phase out ozone-depleting substances?
- (a) Kyoto Protocol
- (b) Paris Agreement
- (c) Montreal Protocol
- (d) Rio Summit
Answer: (c) Montreal Protocol
Explanation: Often hailed as the most successful international environmental treaty, the Montreal Protocol (1987) has led to a significant recovery of the ozone layer. The Kyoto Protocol (1997) and Paris Agreement (2015) deal with greenhouse gases and climate change.
Q13. In environmental protection, what does ‘3R’ stand for?
- (a) Reforest, Reclaim, Recycle
- (b) Reduce, Reuse, Recycle
- (c) Repair, Restore, Replant
- (d) Research, Regulate, Restrict
Answer: (b) Reduce, Reuse, Recycle
Explanation: Note the order! Reduce consumption first, Reuse items as much as possible, and then Recycle what’s left. Recycling is important, but preventing waste at the source (Reduce) is the most effective strategy.
Q18. Which is a non-renewable source of energy?
- (a) Solar energy
- (b) Wind energy
- (c) Natural gas
- (d) Hydroelectric power
Answer: (c) Natural gas
Explanation: Non-renewable sources (coal, oil, natural gas) are finite and take millions of years to form. Renewables (solar, wind, hydro, geothermal) are replenished naturally on a human timescale.
Q20. Which landmark 1992 event was held in Rio de Janeiro?
- (a) Kyoto Protocol
- (b) Earth Summit (UNCED)
- (c) Copenhagen Accord
- (d) Paris Agreement
Answer: (b) Earth Summit (UNCED)
Explanation: The 1992 Earth Summit was a turning point. It led to major agreements like the Convention on Biological Diversity (CBD) and the UN Framework Convention on Climate Change (UNFCCC), which later gave us the Kyoto Protocol and Paris Agreement.
Q24. What is the fundamental concept behind ‘Sustainable Development’?
- (a) Exploiting resources maximally for economic growth.
- (b) Meeting present needs without compromising future generations.
- (c) Prioritizing economic development over environment.
- (d) Relying solely on non-renewable energy.
Answer: (b)
Explanation: This is the Brundtland Commission definition and the heart of modern environmental policy. It balances three pillars: economic development, social equity, and environmental protection.
Q25. Which natural phenomenon is caused by the release of heat from the Earth’s interior?
- (a) Tsunami
- (b) Earthquake
- (c) Cyclone
- (d) Drought
Answer: (b) Earthquake
Explanation: Earthquakes result from the sudden release of energy along geological faults. While a tsunami is often a consequence of an und
