TNPSC syllabus topic · Bilingual study guide

Environmental Chemistry

Environmental chemistry connects chemical processes with air, water and soil pollution, its causes, effects and control.

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10 bilingual articles

2 min

Environmental Chemistry, Pollution and Pollutants

Environmental chemistry connects chemical processes with air, water and soil pollution, its causes, effects and control.

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2 min

Air Pollution and Gaseous Pollutants

Sulphur, nitrogen and carbon oxides and hydrocarbons arise from combustion and affect health, plants, materials and climate.

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2 min

Greenhouse Effect, Global Warming and Acid Rain

Greenhouse gases retain outgoing infrared energy, while sulphur and nitrogen oxides form acids that lower rainwater pH.

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2 min

Particulate Pollutants and Smog

Airborne solids and droplets affect health and visibility; smog differs by climate, precursors and redox character.

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2 min

Stratospheric Ozone and Ozone Depletion

Stratospheric ozone absorbs harmful ultraviolet radiation, while nitrogen oxides and chlorine radicals catalyse its loss.

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2 min

Water Pollution, Sources and Eutrophication

Water quality is degraded by pathogens, wastes, nutrients, metals, sediment, pesticides, radioactivity and heat from identifiable or diffuse sources.

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2 min

BOD, COD and Drinking-Water Quality

BOD and COD express oxygen demand, while pH and dissolved constituents provide additional water-quality indicators.

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2 min

Soil Pollution: Sources and Effects

Persistent toxic chemicals, radioactive materials, salts and pathogens degrade soil structure, fertility, groundwater and food chains.

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1 min

Environmental Pollution Control Strategies

Pollution control prioritises preventing hazardous releases, then managing, reusing and treating unavoidable waste.

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1 min

Green Chemistry: Principle and Examples

Green chemistry redesigns products and processes to reduce or eliminate hazardous substances rather than treating pollution only after formation.

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