Science Image

Ch-19 Pollution of Air

I cannot provide questions written, because of Copyright issue, If you want to Download the Chapter PDF [Book PDF], then Click Here


A. Fill in the blanks.

Q. 1. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- Carbon dioxide (CO2), Nitrogen dioxide (NO2)

Q. 2. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- Marbel Cancer

Q. 3. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- Carbon dioxide (CO2), Mythen

Q. 4. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- Global Warming


B. State True or False for the following statements.

Q. 1. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- True

Q. 2. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- True

Q. 3. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- False

Q. 4. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- False

Q. 5. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- False


C. Tick the correct option.

Q. 1. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- Chlorofluorocarbon (CFL)

Q. 2. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- Global Warming

Q. 3. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- Carbon dioxide, Methene, Water Vapours

Q. 4. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- Sulphur dioxide

Q. 5. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- Smog


D. Answer the following questions in brief.

Q. 1. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- Any substance that is present in the environment if it's proportion is greater than it's natural abundance and causing harmful effects is known as pollutant. For Example:-CO, NO2, etc.

Q. 2. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :-
1. Excessive burning of fossil fuel.
2. Smoke from factories and vehicles.

Q. 3. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- When we inhale Carbon Monoxide then it passes through our lungs into the blood then it combines with the haemoglobin to form a complex substance known as 'Carboxy Hameglobin'. 

Q. 4. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- Chlorofluorocarbons cause the depletion of ozone layer by decomposing ozone to oxygen. This result in an increased amount of ultraviolet (UV) radiations from the sun, reaching the earth. This cause skin cancer and damage to eyes.

Q. 5. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :-  
1. The use of fossil fuels must be minimised.
2. Electricity should be generated from hydroelectric power plants and nuclear reactor.
3. Deforestation must be stopped.


E. Answer the following questions.

Q. 1. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- When smog containing oxides of nitrogen combines with other air pollutants and fog, it forms smog.

1. It leads to disease related to lungs such as bronchitis, asthem.
2. It prevents the sunlight from reaching the earth and effect the normal functioning of plants.

Q. 2. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- Excessive use of fossil fuel released carbon dioxide smoke, nitrogen dioxide and sulphur dioxide in the atmosphere combine with water vapours and forming carbonic acid, nitric acid and sulphuric acid respectively. These acids then fall down on the earth surface after mixing with rain water and making it acidic. Such rain is called acid rain.

Q. 3. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :-  
1. Burning of coal and wood release Carbon dioxide gas into atmosphere.
2. In Thermal power plants coal are used as fuel to generate electricity. This lead to releasing pollutants into atmosphere.
3. Deforestation causes imbalance in the concentration of carbon            dioxide in the atmosphere.

Q. 4. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- 
1. Glaciers will melt at a higher rate and this will lead to a rise in the sea level resulting in floods and loss of soil.
2. Warming of atmosphere often leads to forest fire.

Q. 5. (For Questions, See your book or download this Chapter PDF by Clicking here)

Ans :- 
1. Use of smokeless Chulas, Solar Cooker and biogas.
2. Use of unleaded petrol in vehicles.
3. Plant more and more trees (Afforestation).
5. Use of alterative source of energy instead of Conventional sources of energy.


😋Hope you will like it. If yes😀, then Please Comment Down Below and Share the Post with Your Friends :)