Pollution
ICSE · Class 10 · Biology
Flashcards for Pollution — ICSE Class 10 Biology. Quick Q&A cards covering key concepts, definitions, and formulas.
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See them allWhat is environmental pollution?
Answer
Environmental pollution is a large change in the quality of the environment that affects the life of plants and animals adversely. It is a deterioration in the quality of the environment resulting fro…
What are pollutants? Give examples.
Answer
Pollutants are substances whose addition to the environment causes its pollution. Examples include carbon soot, smoke, smog, sulphur dioxide, carbon monoxide, nitrogen oxide, detergents, lead, mercury…
Differentiate between biodegradable and non-biodegradable pollutants.
Answer
Biodegradable pollutants can be decomposed into harmless constituents by biological activities of microbes (e.g., dead plants, animal waste, paper). Non-biodegradable pollutants are resistant to bioti…
What is the difference between primary and secondary pollutants?
Answer
Primary pollutants are released directly from the source (e.g., CO₂, CO, SO₂, dust particles). Secondary pollutants are produced due to reactions among primary pollutants (e.g., PAN formed when nitrog…
What is air pollution? List its major sources.
Answer
Air pollution is an undesirable change in the physical or biological characteristics of air which may adversely affect life. Major sources include: combustion of fuels, industries (oil refineries, che…
What was the Bhopal Gas Tragedy? What gas was involved?
Answer
In 1984, 40 tons of methyl isocyanate gas accidentally leaked from a factory in Bhopal into the atmosphere. It caused the death of about 2800 people within 15 minutes and left many more blinded or cri…
What is SPM and how does it affect the environment?
Answer
SPM (Suspended Particulate Matter) consists of particles (0.1 to 10μ) that remain suspended in air. Effects: blocks solar radiation causing temperature drop, gets deposited in nasal passages causing r…
What is acid rain? How is it formed and what are its effects?
Answer
Acid rain forms when SO₂ in atmosphere oxidizes to SO₃, which reacts with water to produce H₂SO₄. This comes down with rain (pH as low as 3.0). Effects: corrodes stones and fabrics, destroys biologica…
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