Incorrect statement among the following is: 

1. Oxides of sulphur, nitrogen, and carbon are the most widespread air pollutant.

2. pH of drinking water should be between 6.5 and 8.5.

3. Concentration of dissolved oxygen below 6 ppm is good for the growth of fish.

4. Clean water would have a BOD value of less than 5 ppm.

Subtopic:  Gaseous Pollutants - Oxides of C & N | Air Pollution - Ozone | Water Pollution - Biological Oxygen Demand |
 71%
From NCERT
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The aromatic compound that is present as particulate among the following is : 

1. Benzene

2. Toulene

3. Nitrobenzene

4. Polycyclic hydrocarbons

Subtopic:  Gaseous Pollutants - Oxides of C & N |
 64%
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A non-greenhouse gas is : 
1. CO2
2. CH4
3. Chlorofluorocarbons
4. O2

Subtopic:  Air Pollution - Greenhouse Effect |
 84%
From NCERT
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Links
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The most abundant hydrocarbon pollutant is : 
1. Methane
2. Ethane
3. Propane
4. Butane

Subtopic:  Gaseous Pollutants - Oxides of C & N |
 88%
From NCERT
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Chemical that has major part in acid rain is : 

(1) HNO3

(2) H2SO4

(3) HCl

(4) H2CO3

Subtopic:  Air Pollution - Acid Rain |
 88%
From NCERT
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When rain is accompanied by a thunderstorm, the pH value of the collected rain water is :

1. Dependent upon the amount of dust in the air.

2. Slightly lower when rainwater is without a thunderstorm.

3. Slightly higher when the thunderstorm is not there.

4. Unaffected by the occurrence of thunderstorms.

Subtopic:  Air Pollution - Acid Rain |
 65%
From NCERT
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Which of the following is not one of the prime health risks associated with greater
UV radiations through the atmosphere due to depletion of stratospheric ozone?       

1. Damage to eyes
2. Increased liver cancer
3. Increased skin cancer.
4. Reduced Immune system

Subtopic:  Air Pollution - Global Warming |
 58%
From NCERT
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Which country has the greatest contribution for the hole formation in ozone layer?

1. Russia

2. Japan

3. USA

4. Germany

Subtopic:  Air Pollution - Greenhouse Effect |
 67%
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The ‘thickness’ of Stratospheric Ozone layer is measured in/on:
1. Sieverts units
2. Dobson units
3. Melson units
4. Beaufort Scale

Subtopic:  Ozone Layer Depletion |
 91%
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Gas that is not a pollutant is : 

1. Carbon monoxide

2. Nitrogen peroxide

3. Carbon dioxide

4. Sulphur dioxide

Subtopic:  Gaseous Pollutants - Oxides of C & N |
From NCERT
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