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Why we add drops of sulphuric acid to water?
to make it conducts electricity, as pure water is a bad
conductor of electricity.
Water pollution
Water pollution :-The addition of any substance to the water which
causes change in properties of water and affect health and life of living
creatures
Water pollutants Artificial pollutants
the over uses of chemical
Natural pollutants insecticide andfertilizers
• throwing sewage and factories
• volcanic eruptions wastes andleakage petroleum
• death of living creatures wastes
• lightning • burning coal and oil causes acidic
• rainsand smog
2nd Prep. First Term 36 28
