NCERT Solutions for Class 8 Science Science - NCERT Solution Chapter 18

Pollution of Air and Water Class 8

Chapter 18 Pollution of Air and Water Exercise Solutions

<< Previous Chapter 17 : Stars and the Solar System

Exercise : Solutions of Questions on Page Number : 252

Q1 :  

What are the different ways in which water gets contaminated?


Answer :

Water gets contaminated by the addition of:

(i) Agricultural chemicals: Farmers use excessive amounts of pesticides and fertilizers to increase crop production. These chemicals get carried away to the water bodies due to rains and floods which lead to water pollution.

(ii) Industrial wastes: Industries release harmful chemical wastes into water sources, thereby polluting them.

(iii) Sewage wastes: Waste materials from kitchens, toilets, and laundry sources are also responsible for contaminating water.

Answer needs Correction? Click Here

Q2 :  

At an individual level, how can you help reduce air pollution?


Answer :

An individual can reduce air pollution by:

(i) Avoiding the use of cars as much as possible and by using public transport whenever possible.

(ii) By not using vehicles for short distances.

(iii) By using clean fuels such as LPG and CNG instead of diesel and petrol.

(iv) Always disposing the garbage properly and not burning it.

(v) Controlling the emissions from vehicles and household chimneys.

Answer needs Correction? Click Here

Q3 :  

Clear, transparent water is always fit for drinking. Comment.


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q4 :  

You are a member of the municipal body of your town.

Make a list of measures that would help your town to ensure the supply of clean water to all its residents.


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q5 :  

Explain the differences between pure air and polluted air.


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q6 :  

Explain circumstances leading to acid rain. How does acid rain affect us?


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q7 :  

Which of the following is not a greenhouse gas?

(a) Carbon dioxide

(b) Sulphur dioxide

(c) Methane

(d) Nitrogen


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q8 :  

Describe the 'Greenhouse Effect' in your own words.


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q9 :  

Prepare a brief speech on global warming. You have to deliver the speech in your class.


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q10 :  

Describe the threat to the beauty of the Taj Mahal.


Answer :

Please Register/Login to get access to all solutions Facebook Login
Q11 :  

Why does the increased level of nutrients in the water affect the survival of aquatic organisms?


Answer :

Please Register/Login to get access to all solutions Facebook Login
<< Previous Chapter 17 : Stars and the Solar System

Science - NCERT Solution - Science : CBSE NCERT Exercise Solutions for Class 8th for Pollution of Air and Water will be available online in PDF book form soon. The solutions are absolutely Free. Soon you will be able to download the solutions.

Popular Articles