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प्रश्न
Excess of fluoride in drinking water causes:
पर्याय
Lung disease
Intestinal infection
Fluorosis
None of the above
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उत्तर
Fluorosis
संबंधित प्रश्न
Have you ever observed any water pollution in your area? What measures would you suggest to control it?
What do you mean by Biochemical Oxygen Demand (BOD)?
Clear, transparent water is always fit for drinking. Comment.
Write a brief note on acid rain.
Thermal power plants give out a lot of ______ waste water.
True or False:
Sources of groundwater pollution include leaking sewer lines, pumping wells, landfills, fertilizer, and sludge.
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?
Phosphate containing fertilisers cause water pollution. Addition of such compounds in water bodies causes:
(i) enhanced growth of algae.
(ii) decrease in amount of dissolved oxygen in water.
(iii) deposition of calcium phosphate.
(iv) increase in fish population.
A river with an inflow of domestic sewage rich in organic waste may result in:
Give two examples of water pollutants.
