Water Pollution
Kerala Board · Class 12 · Chemistry
Summary of Water Pollution for Kerala Board Class 12 Chemistry. Key concepts, important points, and chapter overview.
Overview
Water pollution is one of the most critical environmental challenges facing our world today. As the foundation of all life on Earth, water's contamination affects not only aquatic ecosystems but also human health, agriculture, and industrial processes. This chapter explores the complex chemistry beh
Key Concepts
Earth's surface is 75% water
Earth's surface is 75% water, but only 3% is freshwater. Of this, 75% is frozen in ice caps and glaciers. Usable water comes from surface water (preci
Water pollution is measured through three
Water pollution is measured through three types of parameters: Physical (color, odor, turbidity, taste, temperature, electrical conductivity), Chemica
Point sources are well
Point sources are well-defined locations that directly discharge pollutants (like industrial pipes, sewage outlets). Non-point sources are scattered o
Major chemical pollutants include
Major chemical pollutants include: Heavy metals (Hg, Pb, Cr, As) causing neurological damage; Organic pollutants (pesticides, detergents, petroleum pr
Mercury (Hg) released by industries
Mercury (Hg) released by industries is converted by anaerobic bacteria into highly toxic methylmercury (CH₃Hg⁺) and dimethylmercury [(CH₃)₂Hg]. These
Learning Objectives
- Identify and classify Earth's water resources and their availability for human use
- Define water pollution using physical, chemical, and biological parameters
- Analyze major types of water pollutants, their chemical sources, and environmental effects
- Distinguish between natural and anthropogenic pollution sources and their chemical characteristics
- Apply the concept of Biological Oxygen Demand (BOD) to assess water quality chemically
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What are the important topics in Water Pollution for Kerala Board Class 12 Chemistry?
Water Pollution covers several key topics that are frequently asked in Kerala 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 Water Pollution — Kerala 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
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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General Characteristics of the p-block Elements
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Periodic Table and Atomic Properties
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