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Environmental Concerns

Telangana Board · Class 12 · Chemistry

Quick revision notes for Environmental Concerns — Telangana Board Class 12 Chemistry. Key concepts, formulas, and definitions for last-minute revision.

45 questions22 flashcards5 concepts

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Key Topics to Revise

1

Components and Segments of Environment

  • Environment consists of biotic (living organisms like bacteria, plants, animals) and abiotic (air, water, soil, energy) components
  • Four segments of environment: Biosphere (life-supporting region), Atmosphere (gaseous envelope), Hydrosphere (water resources), Lithosphere (solid earth with minerals and soil)
  • Biosphere depends on delicate balance between organisms and environmental components
2

Environmental Threats and Chemical Reactions

  • Vehicular combustion releases CO, CO₂, and SO₂ into atmosphere
  • Acid rain formation: SO₂ + H₂O → H₂SO₄ (sulfuric acid)
  • Pesticides like DDT and dieldrin are non-biodegradable pollutants
3

Types and Classification of Pollutants

  • Pollutants classified as Natural and Anthropogenic (man-made)
  • Natural pollutants: forest fire CO₂, volcanic SO₂, soil erosion particles, natural radioactivity
  • Anthropogenic pollutants further divided into Primary and Secondary
4

Sources and Effects of Pollutants

  • Sources classified as Stationary (fixed location: power plants, factories) and Mobile (moving: vehicles, aircraft)
  • Air pollutants: SO₂ (acid rain, eye irritation), CO/CO₂ (global warming, hemoglobin binding), smoke/ash (respiratory diseases)
  • Heavy metals: Lead and Mercury affect nervous system, CFCs cause kidney damage and ozone depletion

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Full Notes

Key Concepts

Environment consists of biotic components (livingPollution occurs when harmful substances exceedPollutants are classified asKey air pollutants includeWater pollutants include toxic metals (Pb

Frequently Asked Questions

What are the important topics in Environmental Concerns for Telangana Board Class 12 Chemistry?
Environmental Concerns covers several key topics that are frequently asked in Telangana Board 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 Environmental Concerns — Telangana Board Class 12 Chemistry?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision 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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