Free NCERT Solutions For Class 11 Chemistry Chapter 14 : Environmental Chemistry Free PDF Download
Define environmental chemistry?
Explain the tropospheric pollution in 100 words?
Carbon monoxide gas is more dangerous than carbon dioxide gas. Why?
List gases which are responsible for greenhouse effect
Statues and monuments in India are affected by acid rain. How?
What is smog? How is classical smog different from photochemical smog?
Write down the reactions involved during the formation of photochemical smog.
What are the harmful effects of photochemical smog and how can they be controlled?
What are the reactions involved for ozone layer depletion in the stratosphere?
What do you mean by ozone hole? What are its consequences?
What are the major causes of water pollution? Explain
Have you ever observed any water pollution in your area? What measures would you suggest
to control it?
What do you mean by Biochemical Oxygen Demand (BOD)?
Do you observe any soil pollution in your neighborhood? What efforts will you make for
controlling the soil pollution?
What are pesticides and herbicides? Explain giving examples.
What do you mean by green chemistry? How will it help in decreasing environmental
What would have happened if the greenhouse gases were totally missing in the earth’s
A large number of fish are suddenly found floating dead on a lake. There is no evidence of
toxic dumping but you find an abundance of phytoplankton. Suggest a reason for the fish kill.
How can domestic waste be used as manure?
For your agricultural field or garden you have developed a compost producing pit. Discuss the
process in the light of bad odour, flies and recycling of wastes for a good produce.
I. Very Short Answer Type Questions
What do you mean by primary and secondary pollutants of the air?
What is the name of the compound formed when CO combines with blood?
How are NO and NO2 formed in the atmosphere?
What is chlorosis?
Which zone is known as ozonosphere?
Which main gases is responsible for damage is ozone layer?
What is the nature of classical smog?
Name the acids which are responsible for acid rain?
What do you mean by viable and non-viable particulates?
What is siltation?
List out the gases which are considered as major source of air pollution.
Why is acid rain considered as threat to Taj Mahal?
Give one example of organic herbicide.
What are pesticides?
What is PAN stands for?
Give the examples of insecticides.
Which gas was mainly responsible for Bhopal gas tragedy?
What is meant by polar vortex?
What should be the tolerable limit of F ions in drinking water?
II. Short Answer Questions
How carbon monoxide acts as a poison for human beings?
What is ‘Acid Rain’? How is it harmful to the environment?
What is photochemical smog? What are its effects? How can it be controlled?
What do you mean by greenhouse effect? What is the role CO2 in the greenhouse effect?
(a) Define eutrophication and pneumoconiosis.
(b) Write difference between photochemical and classical smog.
III. Multiple Choice Questions
Which of the following acid is most abundant in acid rain?
(a) HCl (b) HNO3 (c) H2SO4 (d) Organic acid
Which of the following causes less pollution?
(a) NOx (b) SOx (c) CO2 (d) CxHy
Besides CO2, the other greenhouse gas is
(a) Ar (b) N2 (c) O2 (d) CH4
BOD is a measure of
(a) Organic pollutant in water (b) Inorganic pollutant in water
(c) Particulate matter in water (d) All of the above
The gas which reacts with haemoglobin in blood is
(a) CO (b) SO2 (c) CO2 (d) NO2
Ozone depletion is mainly due to
(a) HCFs (b) CFCs (c) CH3Br (d) all of the above
The pollutant released in Bhopal gas tragedy was
(a) Ammonia (b) Mustard gas (c) Nitrous oxide (d) Methyl isocyanate
Which of the following will increase the BOD of water supply?
(a) O3 (b) C2H5OH (c) H2O (d) CO2
IV. Hots Questions
What is meant by PCBs?
Which compound is formed when CO combines with blood?
Give three examples in which green chemistry has been applied.