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
251
The term “nuclear winter” is associated with:
Answer:
After-effects of nuclear war (global cooling)
Soot injected into the stratosphere from widespread fires could block sunlight, cooling Earth. This would disrupt agriculture and ecosystems. It’s a hypothesized catastrophic scenario.
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252
The ozone layer is present mainly in the:
Answer:
Stratosphere
The ozone layer peaks in the lower stratosphere (~15–35 km). It absorbs harmful UV-B/UV-C radiation. Tropospheric ozone is a pollutant.
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253
Ecology is:
Answer:
Study of relationships between organisms and their environment
Ecology focuses on interactions within and among species and with abiotic factors. It informs conservation and resource management. Evolutionary biology addresses origins and changes of life.
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254
Pangolins primarily feed on:
Answer:
Ants
Pangolins are myrmecophagous, using long tongues to eat ants and termites. Their scales are made of keratin. Overexploitation for meat and scales has endangered them.
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255
The poisonous gas leaked during the 1984 Bhopal disaster was:
Answer:
MIC
Methyl isocyanate (MIC) leaked from a pesticide plant, causing mass casualties and chronic illnesses. It remains a landmark industrial disaster. Robust safety and oversight are critical.
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256
The most dangerous agents leading to ozone layer depletion include:
Answer:
angerous agents leading to ozone layer depletion include:
CFCs and halons catalyze ozone destruction in the stratosphere. Increased UV at the surface is a **consequence** of depletion, but the option set expects “all,” noting UV’s role in photochemical reactions aloft; still, CFCs/halons are the principal culprits.
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257
Energy stored within Earth is called:
Answer:
Geothermal
Geothermal energy derives from Earth’s internal heat (radioactive decay and residual heat). Magma is molten rock, not the energy category. Tidal and OTEC are ocean-derived energies.
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258
Gas released during photosynthesis is:
Answer:
Oxygen
Water splitting in the light reactions releases O₂. CO₂ is consumed, not produced. Oxygenation supports aerobic life.
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259
Gharial is a:
Answer:
Crocodile
The gharial (Gavialis gangeticus) is a long-snouted, fish-eating crocodilian found in South Asian rivers. It is critically endangered. Its unique snout reduces drag during fish capture.
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260
Blackbuck is a:
Answer:
lackbuck is a:
The blackbuck (Antilope cervicapra) is an antelope native to the Indian subcontinent. Males have spiraled horns and dark coats. It is protected under wildlife laws.
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