Tag: air

Questions Related to air

Air is an example of __________.

water and air and their importance natural resources- air, water and land air around us air chemistry

  1. gas solid solution

  2. gas gas solution

  3. solid solid solution

  4. solid gas solution

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Correct Option: B
Explanation:

Air is a mixture of gases. So, solute and solvent both are gases.

hence, air is known as gas gas solution.

Which is a green house gas?
A) Methane 

B) Chlorofluorocarbons 
C) $CO _{2}$

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. $A$ and $B$

  2. $B$ and $C$

  3. $C$ and $D$

  4. $A, B$ and $C$

Show answer
Correct Option: D
Explanation:

Greenhouse effect
* The progressive heating up of surface of the earth is earth is called green house effect or global warming.
 $CO _2$ and $H _2O$ block a part of the heat (IR) emitted by the earth & reflect back. Due to this earth surface gets heated up.
 50% in $CO _2$ content of air can increase the surface temperature of the earth by $3^oC$.
* In addition to $CO _2$ , the other green - house gases are CFCs (17%), $O _3$ (18%), NO (4%), water vapour (2%).

Which of the following is not a sink for CO?

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. Haemoglobin

  2. Microorganims present in the soil

  3. Oceans

  4. None of the above

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Correct Option: A
Explanation:


* Incomplete combustion of fossil fuels liberate CO into air. 80% of CO is released from automobiles.


* Permissible level of CO in air is 9 ppm. It reduces $O _2$ supply in human by forming a stable carboxyhaemoglobin.

$2C+O _2\rightarrow 2CO$
$2CH _4+3O _2\rightarrow 2CO+4H _2O$

* CO interacts with oxyhaemoglobin ($O _2Hb$) and forms carboxyhaemoglobin (CO-Hb) as :

$O _2Hb+CO\rightarrow COHb+O _2$

* CO has high affinity for haemoglobin than that of oxygen.

Therefore, option A is correct.

The ash can cause _______ problems.

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. digestive 

  2. reproductory 

  3. respiratory 

  4. nervous 

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Correct Option: C
Explanation:

The ash can cause respiratory problems for young children, the elderly or those already with respiratory ailments.

The most problematic gases emitted in a volcanic eruption includes :

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. sulphur dioxide

  2. carbon dioxide

  3. hydrogen fluoride

  4. All of the above

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Correct Option: D

The ____ gets polluted by the presence of dust particles. 

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. air

  2. soil

  3. both $A$ and $B$

  4. none of the above

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Correct Option: A
Explanation:

The air gets polluted by the presence of dust particles.

Diesel vehicles pollute the environment largely through:
A) $CO$
B) $NO _x$
C) ParticulatesNOx

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. A & B

  2. B & C

  3. C & A

  4. A, B & C

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Correct Option: D
Explanation:

Diesel vehicles on burning forms all these as a product so they are major pollutants.

Forest fire produces ...... pollution.

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. air

  2. water

  3. sea

  4. soil

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Correct Option: A
Explanation:

A forest fire is a natural source of air pollution. 


Several major air pollutants can be released when a fire is caused in the forest. 

For example, carbon monoxide even in small quantities can cause several damage to the plant and animal life. Higher levels of carbon monoxide content reduce the oxygen-carrying capacity of the blood and cause breathing problems.

Thus, the correct answer is option A. 

Which one of the following is a  man-made source of air pollution?

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. Volcanic-eruption

  2. Automobile-exhaust

  3. Both A and B

  4. None of these

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Correct Option: B
Explanation:

Anthropogenic or man-made source of pollution is automobile exhaust. When fuel burns various gases like carbon dioxide, oxides of nitrogen, sulfur dioxide, carbon monoxide are released into the air.

Which of these is the major air pollutant in cities like Delhi and Kolkata?

water and air and their importance natural resources- air, water and land air around us air chemistry introduction to natural resources land

  1. Carbon monoxide

  2. Hydrocarbons

  3. Suspended particulate matter

  4. Oxides of nitrogen

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Correct Option: C
Explanation:

According to the air pollution data, the suspended particulate level SPM level is highest in Delhi and Kolkata with 70% residents suffering from respiratory disorders and lung cancers due to high SPM levels in populated areas.