Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?

Environmental Engineering in CE
Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?

SO₂

CFC (chloro fluoro carbons)

CO

NOx

SO₂

CFC (chloro fluoro carbons)

CO

NOx

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Environmental Engineering in CE
Which of the following is a secondary air pollutant?

Photochemical smog

Nitrogen dioxide

Sulphur dioxide

Dust particles

Photochemical smog

Nitrogen dioxide

Sulphur dioxide

Dust particles

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Environmental Engineering in CE
Threshold limit value (TLV) of CO in air is __________ ppm.

5

50

5000

2000

5

50

5000

2000

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Environmental Engineering in CE
There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth's surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about __________ °C/km.

15

1

6.5

0.05

15

1

6.5

0.05

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Environmental Engineering in CE
Salt content in sea water is about __________ percent.

0.5

10

3.5

1

0.5

10

3.5

1

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Environmental Engineering in CE
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.

Hydrogen

None of these

Carbon dioxide

Ozone

Hydrogen

None of these

Carbon dioxide

Ozone

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Environmental Engineering in CE

Environmental Engineering in CE Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?

Environmental Engineering in CE Which of the following is a secondary air pollutant?

Environmental Engineering in CE Threshold limit value (TLV) of CO in air is __________ ppm.

Environmental Engineering in CE Salt content in sea water is about __________ percent.

Environmental Engineering in CE A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.

Environmental Engineering in CE
Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate?

Environmental Engineering in CE
Which of the following is a secondary air pollutant?

Environmental Engineering in CE
Threshold limit value (TLV) of CO in air is __________ ppm.

Environmental Engineering in CE
Salt content in sea water is about __________ percent.

Environmental Engineering in CE
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.