The incorrect statement about carbon monoxide is-

1. It reduces the oxygen-carrying ability of blood.
2. The carboxyhaemoglobin (haemoglobin bound to CO) is less stable than oxyhaemoglobin.
3. It is produced due to incomplete combustion.
4. It forms carboxyhaemoglobin.

Subtopic:  Air Pollution - Smog |
 86%
From NCERT
NEET - 2020
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Select the correct statement from the following statements?

(1) CO which is a major pollutant resulting from the combustion of fuels in automobiles plays a major role in photochemical smog

(2) Classical smog has an oxidizing character while the photochemical smog is reducing in character

(3) Photochemical smog occurs in day time whereas the classical smog occurs in the morning hours

(4) During formation of smog the level of ozone in the atmosphere goes down

Subtopic:  Air Pollution - Greenhouse Effect |
 50%
From NCERT
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‘White lung cancer’ is caused by : 

1. Asbestos

2. Silica

3. Textiles

4. Paper

Subtopic:  Gaseous Pollutants - Oxides of C & N |
 53%
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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 |
 83%
From NCERT
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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 |
 87%
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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