General Science/Everyday Science MCQs
Topic Notes: General Science/Everyday Science
MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
381
Which statement is true?
Answer:
Forests can behave like non-renewable resources if overused
Forests are renewable when managed sustainably, but overexploitation can exhaust them, effectively making them non-renewable. Deforestation reduces oxygen production and biodiversity. Fish populations cannot indefinitely match overharvesting rates.
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382
An area with no permanent roads or settlements, maintained primarily for its primitive character and non-motorized recreation, is a:
Answer:
Wilderness area
Wilderness areas are legally protected lands that preserve natural conditions without permanent human infrastructure. They emphasize solitude, hiking, and non-motorized recreation. This differentiates them from national parks and forests.
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383
Which one is **not** a disadvantage of large dams?
Answer:
Production of hydroelectric energy
Hydroelectric energy is a benefit of dams, not a disadvantage. The real drawbacks include submerging land, high costs, and disrupting river ecosystems. Therefore, energy generation cannot be seen as a drawback.
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384
Which option below is **not** an example of pollution?
Answer:
Overpopulation
Pollution refers to contamination of air, water, or soil by harmful substances or energy. Smog, sewage, and nuclear waste clearly qualify. Overpopulation is a demographic issue that intensifies pollution but is not pollution itself.
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385
Which statement is **false** about the biosphere?
Answer:
It does not contain microbes
The biosphere includes all living organisms, from microbes to plants and animals. Microbes are fundamental, driving nutrient cycles and sustaining ecosystems. The other statements about the biosphere’s scale and age are correct.
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386
Environmental Studies does NOT typically involve:
Answer:
oes NOT typically involve:
Core areas include ecology, policy, economics, ethics, psychology, and demography. Literature can support environmental communication but is not a core analytical discipline in most curricula. Hence it is the least central option here.
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Perfect 👍 Let’s keep the numbering going — we’ll continue from **Q121** onward in the same structure (statement, shuffled options, Correct Answer, and a 3–5 sentence explanation).
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387
Environmental Studies:
Answer:
All of the above
Environmental Studies integrates natural sciences, social sciences, and policy. It examines systems from ecosystems to cities. This breadth supports holistic problem-solving.
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388
Which one is NOT a greenhouse gas?
Answer:
Oxygen (O₂)
CO₂, CH₄, and O₃ absorb infrared radiation, contributing to the greenhouse effect. Oxygen does not significantly absorb IR in the relevant bands. Nitrogen (N₂) likewise is not a GHG.
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389
The current best practice for disposal of high-level nuclear waste is to:
Answer:
Bury it deep underground (geologic disposal)
Deep geological repositories isolate waste for millennia. Ocean dumping and space launch pose unacceptable risks. Reprocessing addresses fuel use but not all waste streams.
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390
Carbon credits are intended for:
Answer:
Protection of environment
Carbon credits incentivize greenhouse gas reductions by assigning economic value to emission cuts. Projects that avoid or remove emissions can sell credits. Markets channel finance toward cleaner practices.
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