Highly polluted water could have a $BOD$ value of: (in $ppm$)
- A$5$
- B$10$
- C$15$
- D$20$
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Similar Questions
The ozone layer is formed naturally by
Medium
View SolutionMatch the activities given in List-$I$ with the pollution produced in List-$II$.
List-$I$ List-$II$ $(A)$ Burning sulfur-containing waste releases gases into the atmosphere. $(1)$ Water pollution $(B)$ Use of carbonates as pesticides $(2)$ Photochemical smog,damage to plant life,corrosion of buildings,respiratory problems,water pollution. $(C)$ Using synthetic detergents for washing clothes $(3)$ Damage to the ozone layer $(D)$ Releasing smoke from vehicles and factories into the atmosphere. $(4)$ Neurological disorders in humans. $(E)$ Using chlorofluorocarbon compounds to clean computer parts. $(5)$ Classical smog,acid rain,water pollution,respiratory problems,damage to buildings,metal corrosion.
| List-$I$ | List-$II$ |
| $(A)$ Burning sulfur-containing waste releases gases into the atmosphere. | $(1)$ Water pollution |
| $(B)$ Use of carbonates as pesticides | $(2)$ Photochemical smog,damage to plant life,corrosion of buildings,respiratory problems,water pollution. |
| $(C)$ Using synthetic detergents for washing clothes | $(3)$ Damage to the ozone layer |
| $(D)$ Releasing smoke from vehicles and factories into the atmosphere. | $(4)$ Neurological disorders in humans. |
| $(E)$ Using chlorofluorocarbon compounds to clean computer parts. | $(5)$ Classical smog,acid rain,water pollution,respiratory problems,damage to buildings,metal corrosion. |
Easy
View SolutionMatch the following List-$I$ ($F^-$ ion concentration in drinking water) with List-$II$ (Effects on humans):
List-$I$ List-$II$ $(A)$ $< 1 \ ppm$ $(i)$ Harmful to bones $(B)$ $> 2 \ ppm$ $(ii)$ Tooth decay $(C)$ $> 10 \ ppm$ $(iii)$ Brown mottling of teeth
Then the correct match is:
| List-$I$ | List-$II$ |
|---|---|
| $(A)$ $< 1 \ ppm$ | $(i)$ Harmful to bones |
| $(B)$ $> 2 \ ppm$ | $(ii)$ Tooth decay |
| $(C)$ $> 10 \ ppm$ | $(iii)$ Brown mottling of teeth |
Then the correct match is:
The consequence of global warming may be the following:
What are pesticides and herbicides? Explain giving examples.
Difficult
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