Advertisements
Advertisements
प्रश्न
State whether the following statement is true or false. If false, write the correct statement.
Chemical pollutants include a metallic salt solution of mercury and lead.
पर्याय
True
False
Advertisements
उत्तर
True
संबंधित प्रश्न
List two major harmful effects of the following:
Rivers contaminated with sewage.
What are the common sources of oil spills?
A lot of fish are dying near a sea shore. Describe any two possible causes.
With reference to the sources of water pollutants answer the following question:
Why is it harmful to dispose of household detergents in water bodies?
Which of the following is a water pollutant?
Contamination of water bodies by human activities is called ______ pollution.
Name any two water pollutants that are toxic for plants and animals.
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?
Explain about oil spills.
Water sample is called cleanest on the basis of which one of the BOD values is given below.
