Free NCERT Solutions For Class 11 Chemistry Chapter 14 : Environmental Chemistry Free PDF Download

Question 1:
Define environmental chemistry?

Question 2:
Explain the tropospheric pollution in 100 words?

Question 3:
Carbon monoxide gas is more dangerous than carbon dioxide gas. Why?

Question 4:
List gases which are responsible for greenhouse effect

Question 5:
Statues and monuments in India are affected by acid rain. How?

Question 6:
What is smog? How is classical smog different from photochemical smog?

Question 7:
Write down the reactions involved during the formation of photochemical smog.

Question 8:
What are the harmful effects of photochemical smog and how can they be controlled?

Question 9:
What are the reactions involved for ozone layer depletion in the stratosphere?

Question 10:
What do you mean by ozone hole? What are its consequences?

Question 11:
What are the major causes of water pollution? Explain

Question 12:
Have you ever observed any water pollution in your area? What measures would you suggest
to control it?

Question 13:
What do you mean by Biochemical Oxygen Demand (BOD)?

Question 14:
Do you observe any soil pollution in your neighborhood? What efforts will you make for
controlling the soil pollution?

Question 15:
What are pesticides and herbicides? Explain giving examples.

Question 16:
What do you mean by green chemistry? How will it help in decreasing environmental
pollution?

Question 17:
What would have happened if the greenhouse gases were totally missing in the earth’s
atmosphere? Discuss.

Question 18:
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.

Question 19:
How can domestic waste be used as manure?

Question 20:
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

Question 1:
What do you mean by primary and secondary pollutants of the air?

Question 2:
What is the name of the compound formed when CO combines with blood?

Question 3:
How are NO and NO2 formed in the atmosphere?

Question 4:
What is chlorosis?

Question 5:
Which zone is known as ozonosphere?

Question 6:
Which main gases is responsible for damage is ozone layer?

Question 7:
What is the nature of classical smog?

Question 8:
Name the acids which are responsible for acid rain?

Question 10:
What do you mean by viable and non-viable particulates?

Question 11:
What is siltation?

Question 13:
List out the gases which are considered as major source of air pollution.

Question 14:
Why is acid rain considered as threat to Taj Mahal?

Question 15:
Give one example of organic herbicide.

Question 16:
What are pesticides?

Question 17:
What is PAN stands for?

Question 18:
Give the examples of insecticides.

Question 19:
Which gas was mainly responsible for Bhopal gas tragedy?

Question 20:
What is meant by polar vortex?

Question 21:
What should be the tolerable limit of F ions in drinking water?

II. Short Answer Questions

Question 1:
How carbon monoxide acts as a poison for human beings?

Question 2:
What is ‘Acid Rain’? How is it harmful to the environment?

Question 3:
What is photochemical smog? What are its effects? How can it be controlled?

Question 4:
What do you mean by greenhouse effect? What is the role CO2 in the greenhouse effect?

Question 5:
(a) Define eutrophication and pneumoconiosis.
(b) Write difference between photochemical and classical smog.

III. Multiple Choice Questions

Question 1:
Which of the following acid is most abundant in acid rain?
(a) HCl (b) HNO3 (c) H2SO4 (d) Organic acid

Question 2:
Which of the following causes less pollution?
(a) NOx (b) SOx (c) CO2 (d) CxHy

Question 3:
Besides CO2, the other greenhouse gas is
(a) Ar (b) N2 (c) O2 (d) CH4

Question 4:
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

Question 5:
The gas which reacts with haemoglobin in blood is
(a) CO (b) SO2 (c) CO2 (d) NO2

Solution 3:

Question 6:
Ozone depletion is mainly due to
(a) HCFs (b) CFCs (c) CH3Br (d) all of the above

Question 7:
The pollutant released in Bhopal gas tragedy was
(a) Ammonia (b) Mustard gas (c) Nitrous oxide (d) Methyl isocyanate

Question 8:
Which of the following will increase the BOD of water supply?
(a) O3 (b) C2H5OH (c) H2O (d) CO2

IV. Hots Questions

Question 1:
What is meant by PCBs?

Question 2:
Which compound is formed when CO combines with blood?

Question 3:
Give three examples in which green chemistry has been applied.