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
421
The most harmful ultraviolet radiation for humans (that reaches Earth’s surface) is:
Answer:
UV-B
UV-B has higher energy than UV-A and is poorly filtered, causing sunburn, DNA damage, and skin cancers. UV-C is the most energetic but is almost entirely absorbed by the ozone layer. Hence, UV-B is the chief health concern at ground level.
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422
The most abundant noble gas in Earth’s atmosphere is:
Answer:
Argon
Argon makes up about 0.93% of the atmosphere, far exceeding other noble gases. Neon, krypton, and xenon are present only in trace amounts. Argon is inert and accumulates through the decay of potassium-40.
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423
The leader of the Narmada Bachao Andolan (NBA) was:
Answer:
Medha Patkar
Medha Patkar is the most prominent face of the Narmada Bachao Andolan, a social movement opposing large dam projects on the Narmada River. The NBA advocated rehabilitation of displaced people and ecological safeguards. Vandana Shiva is known for environmental activism on biodiversity and seed sovereignty, not NBA.
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424
Which organ is primarily affected by pneumonia?
Answer:
Lungs
Pneumonia is an infection that inflames the air sacs in the lungs. The sacs may fill with fluid, causing breathing difficulties. It is often caused by bacteria, viruses, or fungi.
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Awesome—continuing from **Q81** with the same structure (statement, shuffled options, Correct Answer, 3–5 sentence explanation):
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425
Acid rain mainly contains:
Answer:
Sulphuric acid
Acid rain is primarily formed by sulfur dioxide and nitrogen oxides reacting with water in the atmosphere. These form sulfuric and nitric acids. It damages vegetation, soils, and monuments.
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426
Zoos are examples of:
Answer:
re examples of:
Ex situ conservation involves protecting species outside their natural habitats, such as in zoos or botanical gardens. It is used for endangered species preservation. In contrast, in situ conservation protects them within their natural habitats.
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427
The destruction of habitats for plants and animals is known as:
Answer:
Habitat loss
Habitat loss occurs when natural areas are destroyed for human activities like urbanization, farming, or mining. It is the leading cause of biodiversity decline. Species without habitats face extinction risks.
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428
All the genes present in a population collectively are called the:
Answer:
ll the genes present in a population collectively are called the:
The gene pool includes all genetic material within a population. It reflects genetic diversity and adaptability. Larger gene pools allow populations to better withstand environmental changes.
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429
Forests that occur in areas with low rainfall are:
Answer:
Deciduous forests
Deciduous forests shed their leaves in dry seasons to conserve water. They dominate low-rainfall areas in tropical and subtropical regions. Coniferous and evergreen forests, however, occur in wetter or colder regions.
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430
The amount of solar radiation reaching Earth’s surface is called:
Answer:
mount of solar radiation reaching Earth’s surface is called:
Solar flux measures the rate of solar energy per unit area on Earth’s surface. It drives climate, photosynthesis, and energy cycles. Variations in flux influence weather and seasons.
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