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प्रश्न
Excess of fluoride in drinking water causes:
विकल्प
Lung disease
Intestinal infection
Fluorosis
None of the above
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उत्तर
Fluorosis
संबंधित प्रश्न
Clear, transparent water is always fit for drinking. Comment.
Classify the given sources of water pollution as natural and manmade:
(1) domestic waste
(2) dead animals
(3) oil spills
(4) ashes released due to forest fires
List two major harmful effects of the following:
Rivers contaminated with sewage.
Mention any two sources of water pollution.
With reference to the sources of water pollutants answer the following question:
In what way does the industrial waste pollute water?
Water pollution can spread ________ diseases in man.
Contamination of water bodies by human activities is called ______ pollution.
Classify the most significant sources of water pollutants.
Read the paragraph and answer the questions following it.
| Water is essential for life. Without water there would be no life. We usually take water as granted for its purity, but we must ensure the quality of water. Pollution of water originates from human activities. Through different paths, pollution reaches to groundwater. Easily identified source or place of pollution is called as point source, e.g. municipal and industrial discharge pipes, where pollutants enter the water source. Non-point sources of pollution are those where a source of pollution cannot be easily identified, e.g. agricultural run-off, acid rain, etc. |
- How do you classify the various sources of water pollution?
- What are the point sources of water pollution?
- Name any two non-point sources of water pollution?
Industrial wastes mainly consist of chemical pollutants.
