NCERT Solutions for Class 11 Chemistry Chapter 14 Environmental Chemistry


NCERT Solutions for Class 11 Chemistry Chapter 14 Environmental Chemistry

In this chapter, we will focus on environmental chemistry. Environmental chemistry plays a major role in our environment. Various chemical species present in the environment which are either naturally occurring or either generated by human activities. This is an important chapter for a chemistry student. There is a total of 20 questions in the exercise. The NCERT Solutions for Class 11 Chemistry Chapter 14 Environmental Chemistry are prepared and designed by subject experts. These NCERT solutions help students in their preparation of CBSE class 11 final examination and also help in various competitive exams like NEET, JEE Main etc. In this chapter, we will discuss environmental pollution related to the water, soil and air, cause of smog, depletion of the ozone layer, global warming, greenhouse effect etc.

NCERT Class 11 Chemistry Chapter 14 Environmental Chemistry starts with two important lines "The world has achieved brilliance without wisdom, power without conscience. Ours is a world of nuclear giants and ethical infants". Environmental studies deal with the sum of all biological, physical, chemical, economical and social interrelations with our surroundings. After completing this chapter students will be able to define atmospheric pollution, and list reasons for the water pollution, soil pollution,  greenhouse effect, global warming and acid rain; able to identify causes of the ozone layer and what is its effects on the environment and appreciate the importance of green chemistry in our daily life.

What is Environmental chemistry?

Environmental chemistry is a branch of chemistry which deals with the transport reactions, chemical change, effects and fates of chemical species in the environment. It has three main components:-Abiotic (non-living thing), Biotic (living things) and Energy component. According to environmental studies, as a human being, it's our responsibility to protect our environment.

Important points of Class 11 Chemistry Chapter 14 Environmental Chemistry-

  1. Pollution is the effect of undesirable changes in the environment, resulting in harmful effects on human beings, animals and plants.
  2.  Pollutants exist in all three states-solid, liquid, and gaseous state.
  3. Atmospheric pollution generally studies as tropospheric pollution and stratospheric pollution. The troposphere extends up to the height of ~10 Km from the sea level. And stratosphere extends above troposphere up to the 50 km.
  4. One of the important constituents of the stratosphere is the ozone layer.
  5. BOD(Biological oxygen demand)- the amount of dissolved oxygen needed by bacteria to break down the organic material present in a certain volume in the water sample. For clean water, the BOD value is less than 5ppm whereas highly polluted water could have a BOD value of 17 ppm or more.BOD=\frac{Number\:of\:mg\:of\:O_2\:required}{Number\:of\:litres\:of\:samples}=\frac{Parts \:of\:O_2}{Million \:parts\:of\:sample}                                                 

Topics of NCERT Grade 11 Chemistry Chapter 14 Environmental Chemistry

14.1 Environmental Pollution

14.2 Atmospheric Pollution

14.3 Water Pollution

14.4 Soil Pollution

14.5 Industrial Waste

14.6 Strategies to control Environmental Pollution

14.7 Green Chemistry

NCERT Solutions for Class 11 Chemistry Chapter 14 Environmental Chemistry- Exercise Questions

Q-14.1 Define environmental chemistry.

Q-14.2 Explain tropospheric pollution in 100 words.

View all NCERT Solutions for Class 11 Chemistry Chapter 14 Environmental Chemistry here.

NCERT Solutions for class 11 Chemistry


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States of Matter






Redox Reaction




The S-Block Elements


The P-Block Elements


Organic chemistry- some basic principles and techniques



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