Tamil Nadu Board of Secondary EducationHSC Science Class 11th
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Tamil Nadu Board Samacheer Kalvi solutions for Class 11th Chemistry Volume 1 and 2 Answers Guide chapter 15 - Environmental Chemistry [Latest edition]

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Class 11th Chemistry Volume 1 and 2 Answers Guide - Shaalaa.com
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Chapter 15: Environmental Chemistry

Choose the best answerWrite brief answer to the following questions.
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Choose the best answer [Pages 277 - 279]

Tamil Nadu Board Samacheer Kalvi solutions for Class 11th Chemistry Volume 1 and 2 Answers Guide Chapter 15 Environmental ChemistryChoose the best answer [Pages 277 - 279]

Choose the best answer | Q I. 1. | Page 277

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

Choose the best answer | Q I. 2. | Page 277

Which of the following is natural and human disturbance in ecology?

  • Forest fire

  • Floods

  • Acid rain

  • Green house effect

Choose the best answer | Q I. 3. | Page 277

Bhopal Gas Tragedy is a case of ________.

  • thermal pollution

  • air pollution

  • nuclear pollution

  • land pollution

Choose the best answer | Q I. 4. | Page 277

Haemoglobin of the blood forms carboxy haemoglobin with ______.

  • Carbon dioxide

  • Carbon tetra chloride

  • Carbon monoxide

  • Carbonic acid

Choose the best answer | Q I. 5. | Page 277

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

Choose the best answer | Q I. 6. | Page 277

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

Choose the best answer | Q I. 7. | Page 277

The pH of normal rain water is ______.

  • 6.5

  • 7.5

  • 5.6

  • 4.6

Choose the best answer | Q I. 8. | Page 278

Ozone depletion will cause ______.

  • forest fires

  • eutrophication

  • bio magnification

  • global warming

Choose the best answer | Q I. 9. | Page 278

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

Choose the best answer | Q I. 10. | Page 278

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

Choose the best answer | Q I. 11. | Page 278

Release of oxides of nitrogen and hydrocarbons into the atmosphere by motor vehicles is prevented by using ______.

  • grit chamber

  • scrubbers

  • trickling filters

  • catalytic convertors

Choose the best answer | Q I. 12. | Page 278

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

Choose the best answer | Q I. 13. | Page 278

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

Choose the best answer | Q I. 14. | Page 278

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.

Choose the best answer | Q I. 15. | Page 279

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

Choose the best answer | Q I. 16. | Page 279

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 and (R) is not the correct explanation of (A)

  • Both (A) and (R) are not correct

  • (A) is correct but (R) is not correct

Choose the best answer | Q I. 17. | Page 279

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. [Pages 279 - 280]

Tamil Nadu Board Samacheer Kalvi solutions for Class 11th Chemistry Volume 1 and 2 Answers Guide Chapter 15 Environmental ChemistryWrite brief answer to the following questions. [Pages 279 - 280]

Write brief answer to the following questions. | Q II. 1. | Page 279

Dissolved oxygen in water is responsible for aquatic life. What processes are responsible for the reduction in dissolved oxygen in water?

Write brief answer to the following questions. | Q II. 2. | Page 279

What would happen, if the greenhouse gases were totally missing in the earth’s atmosphere?

Write brief answer to the following questions. | Q II. 3. | Page 279

Define smog.

Write brief answer to the following questions. | Q II. 4. | Page 279

Which is considered to be the earth’s protective umbrella? Why?

Write brief answer to the following questions. | Q II. 5. | Page 279

What is degradable pollutants?

Write brief answer to the following questions. | Q II. 5. | Page 279

What is non-degradable pollutants?

Write brief answer to the following questions. | Q II. 6. | Page 279

From where does ozone come in the photo chemical smog?

Write brief answer to the following questions. | Q II. 7. | Page 279

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?

Write brief answer to the following questions. | Q II. 8. | Page 279

What is green chemistry?

Write brief answer to the following questions. | Q II. 9. | Page 279

Explain how does greenhouse effect cause global warming.

Write brief answer to the following questions. | Q II. 10. | Page 279

Mention the standards prescribed by BIS for quality of drinking water.

Write brief answer to the following questions. | Q II. 11. | Page 279

How does classical smog differ from photochemical smog?

Write brief answer to the following questions. | Q II. 12. | Page 280

What are particulate pollutants? Explain any three.

Write brief answer to the following questions. | Q II. 13. | Page 280

Even though the use of pesticides increases crop production, they adversely affect living organisms. Explain the function and the adverse effects of pesticides.

Write brief answer to the following questions. | Q II. 14 | Page 280

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

  1. What is the danger associated with these gases?
  2. How do the pollutants affect the human body?
Write brief answer to the following questions. | Q II. 15. | Page 280

On the basis of chemical reactions involved, explain how do CFC’s cause depletion of ozone layer in stratosphere?

Write brief answer to the following questions. | Q II. 16. | Page 280

How is acid rain formed?

Write brief answer to the following questions. | Q II. 16. | Page 280

Explain the effects of acid rain.

Write brief answer to the following questions. | Q II. 17. (i) | Page 280

Differentiate the following:

BOD and COD

Write brief answer to the following questions. | Q II. 17. (ii) | Page 280

Differentiate the following:

Viable and non-viable particulate pollutants

Write brief answer to the following questions. | Q II. 18. | Page 280

Explain how oxygen deficiency is caused by carbon monoxide in our blood? Give its effect.

Write brief answer to the following questions. | Q II. 19. | Page 280

What are the various methods you suggest to protect our environment from pollution?

Chapter 15: Environmental Chemistry

Choose the best answerWrite brief answer to the following questions.
Class 11th Chemistry Volume 1 and 2 Answers Guide - Shaalaa.com

Tamil Nadu Board Samacheer Kalvi solutions for Class 11th Chemistry Volume 1 and 2 Answers Guide chapter 15 - Environmental Chemistry

Tamil Nadu Board Samacheer Kalvi solutions for Class 11th Chemistry Volume 1 and 2 Answers Guide chapter 15 (Environmental Chemistry) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Tamil Nadu Board of Secondary Education Class 11th Chemistry Volume 1 and 2 Answers Guide solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Tamil Nadu Board Samacheer Kalvi textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 11th Chemistry Volume 1 and 2 Answers Guide chapter 15 Environmental Chemistry are Quality of Drinking Water, Soil Pollution - Pesticides, Herbicides, Environmental Pollution - Introduction, Atmospheric Pollution, Types of Environmental Pollution, Strategies to Control Environmental Pollution, Stratospheric Pollution, Green Chemistry - Introduction, Water Pollution and Its Causes, Water Pollution and Its Causes.

Using Tamil Nadu Board Samacheer Kalvi Class 11th solutions Environmental Chemistry exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Tamil Nadu Board Samacheer Kalvi Solutions are important questions that can be asked in the final exam. Maximum students of Tamil Nadu Board of Secondary Education Class 11th prefer Tamil Nadu Board Samacheer Kalvi Textbook Solutions to score more in exam.

Get the free view of chapter 15 Environmental Chemistry Class 11th extra questions for Class 11th Chemistry Volume 1 and 2 Answers Guide and can use Shaalaa.com to keep it handy for your exam preparation

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