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?

NOx

CFC (chloro fluoro carbons)

CO

SO₂

NOx

CFC (chloro fluoro carbons)

CO

SO₂

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Environmental Engineering in CE
Which of the following pollutants is not emitted during volcanic eruptions?

CO

SO₂

Hydrocarbons

H₂S

CO

SO₂

Hydrocarbons

H₂S

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Environmental Engineering in CE
Higher concentration of CO₂ in atmosphere

Reflects and absorbs the longer wavelength (infra-red) radiations

Prevents solar heat being radiated out completely, resulting in

Allows visible solar radiation (ultraviolet) of short wave-length to pass through

All of these

Reflects and absorbs the longer wavelength (infra-red) radiations

Prevents solar heat being radiated out completely, resulting in

Allows visible solar radiation (ultraviolet) of short wave-length to pass through

All of these

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Environmental Engineering in CE
'Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the

Photochemical reaction in polluted atmosphere

Industrial chimney exhaust

Automobiles exhaust

Burning of domestic fuel

Photochemical reaction in polluted atmosphere

Industrial chimney exhaust

Automobiles exhaust

Burning of domestic fuel

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Environmental Engineering in CE
The upper layer of atmosphere is called the

Stratosphere

Ionosphere

None of these

Troposphere

Stratosphere

Ionosphere

None of these

Troposphere

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Environmental Engineering in CE
Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N₂ in contaminated air at which it acts as a natural asphyxant is ≥ __________ percent.

84

80

92

88

84

80

92

88

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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 pollutants is not emitted during volcanic eruptions?

Environmental Engineering in CE Higher concentration of CO₂ in atmosphere

Environmental Engineering in CE 'Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the

Environmental Engineering in CE The upper layer of atmosphere is called the

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 pollutants is not emitted during volcanic eruptions?

Environmental Engineering in CE
Higher concentration of CO₂ in atmosphere

Environmental Engineering in CE
'Safe limit' called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the

Environmental Engineering in CE
The upper layer of atmosphere is called the