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Pollution

Telangana Open School (TOSS) · Class 12 · Biology

Complete topic list for Pollution in Telangana Open School (TOSS) Class 12 Biology. Key concepts, sub-topics, and what to focus on for board exams.

54 questions30 flashcards5 concepts

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4 Topics · Telangana Open School (TOSS) Class 12 Biology

Topics in Pollution

1

Definition and Types of Pollution

  • Pollution is the addition of unwanted or harmful substances into the environment that adversely affect living beings and ecosystems.
  • Pollutants are the agents that cause pollution. They can be chemical, physical, or biological in nature.
  • Main types of pollution: Air, Water, Soil, Noise, and Radiation pollution.
2

Air Pollution

  • Air pollution is the contamination of air by harmful gases, particulate matter, and biological molecules.
  • Major sources: vehicles, industries, power plants, burning of fossil fuels, firewood, and crop residues.
  • Primary pollutants: CO, CO₂, SO₂, NO₂, PM (Particulate Matter), VOCs.
3

Water Pollution

  • Water pollution occurs when harmful substances contaminate water bodies, making water unfit for use.
  • Sources: domestic sewage, industrial effluents, agricultural runoff (fertilizers, pesticides), plastic waste.
  • Key pollutants: organic waste, heavy metals (lead, mercury), pathogens, oils, plastics, heated effluents.
4

Soil Pollution

  • Soil pollution is the degradation of soil quality due to harmful chemicals or waste.
  • Sources: agricultural chemicals (fertilizers, pesticides), industrial waste, plastic waste, improper waste disposal.
  • Effects: reduced soil fertility, decreased crop yield, contamination of food chain, harm to soil organisms.

Key Concepts

Central concept: Pollution

Definition of PollutionTypes of PollutionPollutantsAir PollutionWater PollutionSoil PollutionNoise PollutionPlastic Pollution

Frequently Asked Questions

What are the important topics in Pollution for Telangana Open School (TOSS) Class 12 Biology?
Pollution covers several key topics that are frequently asked in Telangana Open School (TOSS) Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Pollution — Telangana Open School (TOSS) Class 12 Biology?
Understand the core concepts first, then work through the 54 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All 41 chapters — Telangana Open School (TOSS) Class 12 Biology Syllabus

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