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Chapters
2: Quantum Mechanical Model of Atom
3: Periodic Classification Of Elements
4: Hydrogen
5: Alkali and Alkaline Earth Metals
6: Gaseous State
7: Thermodynamics
8: Physical and Chemical Equilibrium
9: Solutions
10: Chemical bonding
11: Fundamentals of Organic Chemistry
12: Basic concept of organic reactions
13: Hydrocarbons
14: Haloalkanes and Haloarenes
▶ 15: Environmental Chemistry
![Samacheer Kalvi solutions for Chemistry - Volume 1 and 2 [English] Class 11 TN Board chapter 15 - Environmental Chemistry - Shaalaa.com](/images/chemistry-volume-1-and-2-english-class-11-tn-board_6:5f2b1b2038084cf381bfa42c826a928c.jpg "Samacheer Kalvi solutions for Chemistry - Volume 1 and 2 [English] Class 11 TN Board chapter 15 - Environmental Chemistry")
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Solutions for Chapter 15: Environmental Chemistry
Below listed, you can find solutions for Chapter 15 of Tamil Nadu Board of Secondary Education Samacheer Kalvi for Chemistry - Volume 1 and 2 [English] Class 11 TN Board.
Samacheer Kalvi solutions for Chemistry - Volume 1 and 2 [English] Class 11 TN Board 15 Environmental Chemistry Evaluation [Pages 277 - 280]
Choose the best answer
The gaseous envelope around the earth is known as atmosphere. The region lying between an altitudes of 11 – 50 km is _______.
Troposphere
Mesosphere
Thermosphere
Stratosphere
Which of the following is natural and human disturbance in ecology?
Forest fire
Floods
Acid rain
Green house effect
Bhopal Gas Tragedy is a case of ________.
thermal pollution
air pollution
nuclear pollution
land pollution
Haemoglobin of the blood forms carboxy haemoglobin with ______.
Carbon dioxide
Carbon tetra chloride
Carbon monoxide
Carbonic acid
Which sequence for green house gases is based on GWP?
CFC > N2O > CO2 > CH4
CFC > CO2 > N2O > CH4
CFC > N2O > CH4 > CO2
CFC > CH4 > N2O > CO2
Photo chemical smog formed in congested metropolitan cities mainly consists of ______.
Ozone, SO2 and hydrocarbons
Ozone, PAN and NO2
PAN, smoke and SO2
Hydrocarbons, SO2 and CO2
The pH of normal rain water is ______.
6.5
7.5
5.6
4.6
Ozone depletion will cause ______.
forest fires
eutrophication
bio magnification
global warming
Identify the wrong statement in the following.
The clean water would have a BOD value of more than 5 ppm
Greenhouse effect is also called as Global warming
Minute solid particles in air is known as particulate pollutants
Biosphere is the protective blanket of gases surrounding the earth
Living in the atmosphere of CO is dangerous because it ______.
Combines with O2 present inside to form CO2
Reduces organic matter of tissues
Combines with hemoglobin and makes it incapable to absorb oxygen
Dries up the blood
Release of oxides of nitrogen and hydrocarbons into the atmosphere by motor vehicles is prevented by using ______.
grit chamber
scrubbers
trickling filters
catalytic convertors
Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be ______.
highly polluted
poor in dissolved oxygen
rich in dissolved oxygen
low COD
Match the List I with List II and select the correct answer using the code given below the lists.
| List I | List II | ||
| A | Depletion of ozone layer |
1 | CO2 |
| B | Acid rain | 2 | NO |
| C | Photochemical smog | 3 | SO2 |
| D | Green house effect | 4 | CFC |
A - 3, B - 4, C - 1, D - 2
A - 2, B - 1, C - 4, D - 3
A - 4, B - 3, C - 2, D - 1
A - 2, B - 4, C - 1, D - 3
Match the List I with List II and select the correct answer using the code given below the lists.
| List I | List II | ||
| A | Stone leprosy | 1 | CO |
| B | Biological magnification | 2 | Green house gases |
| C | Global warming | 3 | Acid rain |
| D | Combination with haemoglobin | 4 | DDT |
A - 1, B - 2, C - 3, D - 4
A - 3, B - 4, C - 2, D - 1
A - 2, B - 3, C - 4, D - 1
A - 4, B - 2, C - 1, D - 3
The questions gives below consists of an assertion the reason. Choose the correct option.
Assertion (A): If BOD level of water in a reservoir is more than 5 ppm it is highly polluted.
Reason(R): High biological oxygen demand means high activity of bacteria in water.
Both (A) and R are correct and (R) is the correct explanation of (A)
Both (A) and R are correct and (R) is not the correct explanation of (A)
Both (A) and (R) are not correct
(A) is correct but (R) is not correct
Assertion (A): Excessive use of chlorinated pesticide causes soil and water pollution.
Reason (R): Such pesticides are non-biodegradable.
Both A and R are correct and R is the correct explanation of A.
Both A and R are correct but R is not the correct explanation of A.
Both A and R are not correct.
A is not correct but R is correct.
Assertion (A): Oxygen plays a key role in the troposphere.
Reason (R): Troposphere is not responsible for all biological activities.
Both (A) and R are correct and (R) is the correct explanation of (A)
Both (A) and (R) are correct and (R) is not the correct explanation of (A)
Both (A) and (R) are not correct
(A) is correct but (R) is not correct
Write brief answer to the following questions.
Dissolved oxygen in water is responsible for aquatic life. What processes are responsible for the reduction in dissolved oxygen in water?
What would happen, if the greenhouse gases were totally missing in the earth’s atmosphere?
Define smog.
Which is considered to be the earth’s protective umbrella? Why?
What is degradable pollutants?
What is non-degradable pollutants?
From where does ozone come in the photo chemical smog?
A person was using water supplied by corporation. Due to shortage of water he started using underground water. He felt laxative effect. What could be the cause?
What is green chemistry?
Explain how does greenhouse effect cause global warming.
Mention the standards prescribed by BIS for quality of drinking water.
How does classical smog differ from photochemical smog?
What are particulate pollutants? Explain any three.
Even though the use of pesticides increases crop production, they adversely affect living organisms. Explain the function and the adverse effects of pesticides.
Ethane bums completely in air to give CO2. while in a limited supply of air gives CO. The same gases are found in automobile exhaust. Both CO and CO2 are atmospheric pollutants
- What is the danger associated with these gases?
- How do the pollutants affect the human body?
On the basis of chemical reactions involved, explain how do CFC’s cause depletion of ozone layer in stratosphere?
How is acid rain formed?
Explain the effects of acid rain.
Differentiate the following:
BOD and COD
Differentiate the following:
Viable and non-viable particulate pollutants
Explain how oxygen deficiency is caused by carbon monoxide in our blood? Give its effect.
What are the various methods you suggest to protect our environment from pollution?
Solutions for 15: Environmental Chemistry
Samacheer Kalvi solutions for Chemistry - Volume 1 and 2 [English] Class 11 TN Board chapter 15 - Environmental Chemistry
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Concepts covered in Chemistry - Volume 1 and 2 [English] Class 11 TN Board chapter 15 Environmental Chemistry are Environmental Pollution - Introduction, Atmospheric Pollution, Types of Environmental Pollution, Stratospheric Pollution, Quality of Drinking Water, Soil Pollution - Pesticides, Herbicides, Strategies to Control Environmental Pollution, Green Chemistry - Introduction, Water Pollution and Its Causes.
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