NCERT Solutions for Class 12 Biology Chapter 16 PDF: Environmental Issues Class 12 Biology NCERT solutions are provided in this article. Students who are looking for NCERT solutions for Class 12 Biology Chapter 16 can check it for free from here.
Students can also download the NCERT solutions for Class 12 Biology Chapter 16 Environmental Issues PDF for free in order to study in offline mode. Along with NCERT Solutions, we have also provided important questions at the end of the article to help you in your Class 12 Biology exam preparations.
NCERT Solutions for Class 12 Biology Chapter 16 PDF Download
Check out the NCERT solutions for Class 12 Biology Chapter 16 here. You can also download the CBSE Class 12 Biology Chapter 16 NCERT solutions PDF to study in offline mode.
All the NCERT Solutions provided in this article are solved by academic experts at Embibe in order to help students of Class 12 to secure good marks in the exam. Each and every question comes with a detailed solution. The CBSE NCERT solutions for 12th Class Biology Chapter 16 – Environmental Issues will not only help students prepare for their board exam but will also help to crack various competitive exams, such as NEET, MHT-CET, etc.
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CBSE NCERT Solutions for Class 12 Biology Chapter 16 – Important Questions
Some of the important questions for CBSE Class 12 Biology Chapter 16 are as under:
|5 Marks Important Questions from Environmental Issues |
1. Expand CFG and explain in details?
2. Why is the Ozone layer required in Statospeher?
3. Why are catalytic converters recommended in vehicles?
4. What is pollution & Explain types of pollution?
|3 Marks Important Questions from Environmental Issues |
1. A factory drains its waste water into the nearby lake. It has caused algal bloom. (a) How was the algal bloom caused? (b) What would be the consequences? (c) Name the phenomenon that caused it.
2. Motor vehicles with catalytic converter should use unleaded petrol. Why?
3.Why should we be thankful to micro-organism present in domestic sewage?
|2 Marks Important Questions from Environmental Issues |
1. Vehicles are fitted with catalytic converters. Give reason
2. It was observed that some of the aquatic birds’ population has been declining. On analysis of the water in their habitat, high concentration of DDT was found
a) What caused the decline is birds’ population?
b) What is this phenomenon known as?
3. A man had a B. class Benz which has a very good catalytic converter. On his way the petrol was exhausted & he stopped at a petrol pump. The person at the petrol pump had only leaded petrol. Out of necessity the man had to fill leaded petrol in his car.
a) What is its impact on the catalytic activity of the converter?
b) Explain the impact on the environment.
4. A person has inhaled air having particulate pollutants of size less than 2.5 micrometers in diameter. What could be the impact of their pollutants on his respiratory system?
5. Mention the green house gases & their proportion in the pie diagram given below.
|1 Mark Important Questions from Environmental Issues |
1. State the cause of accelerated eutrophication.
2. Why is Eichhornia crassipes nick named as Terror of Bengal?
3. How do algal blooms affect the life in water bodies?
4. Name the world’s most problematic aquatic weed. What is the nature of the waterbody in which the weeds grow abundantly?
Students who are running out of time and want to study only important questions can go through the above-listed questions. For answers to the above questions, students can refer to the NCERT Solutions provided on this page. The CBSE NCERT solutions for Class 12 Biology Chapter 16 provided here include answers to textbook questions, exemplary questions, MCQs, long and short answer questions, exercises and worksheets. So, you can easily score good marks in your exams by referring to these solutions.
CBSE NCERT Solutions for Class 12 Biology Chapter 16 PDF
Let’s look at the list of topics and subtopics included in this chapter:
|Ex 16.1||Air Pollution and Its Control|
|Ex 16.2||Water Pollution and Its Control|
|Ex 16.3||Solid Wastes|
|Ex 16.4||Agro-chemicals and their Effects|
|Ex 16.5||Radioactive Wastes|
|Ex 16.6||Greenhouse Effect and Global Warming|
|Ex 16.7||Ozone Depletion in the Stratosphere|
|Ex 16.8||Degradation by Improper Resource Utilisation and Maintenance|
NCERT Solutions for Class 12 Biology Chapter 16: Chapter Description
The size of the human population has grown tremendously over the last hundred years. The increase in the human population has resulted in an increase in demand for food, water, home, electricity, automobile, and many more commodities. These requirements are exercising enormous pressure on natural resources. This, in turn, causes pollution of air, water, and soil.
Pollution is any undesirable change in physical, chemical or biological characteristics of air, land, water or soil. So, in this chapter, you will learn about the different types of Environmental Issues we are facing and what the effects of pollution are.
FAQs Related to NCERT Solutions for Class 12 Biology Chapter 16
A. Follow the link given and download NCERT Solutions for Class 12 Biology (All Chapters) on Embibe.
A. There is a total of 9 exercises in NCERT Solutions for Class 12 Biology Chapter 16.
A. It will lead to the melting of polar ice caps and lead to a rise in Sea level. The increase in sea level may, in turn, lead to the submergence of the coastal areas. Climatic change is a threat to human health in tropical and subtropical countries. It will also create an imbalance in the water cycle of Earth.
A. Ozone layer depletion is the gradual thinning of the earth’s ozone layer in the upper atmosphere caused due to release of chemical compounds containing gaseous bromine or chlorine from industries and human activities. Chlorofluorocarbons are, therefore, termed significant ozone-depleting substances (ODS).
A. Global warming causes an increase in the earth’s temperature generally due to the greenhouse effect caused by increased carbon dioxide levels, CFCs, and other pollutants.
A. The large-scale removal of trees from forests (or other lands) to facilitate human activities is called Deforestation. It is a severe environmental concern since it can result in biodiversity loss, damage to natural habitats, disturbances in the water cycle, and soil erosion.
Now you are provided with all the detailed CBSE Class 12 Biology Chapter 16 solutions. Students are also advised to take free Environmental Issues mock tests on Embibe. Taking this mock test will not only help students prepare for their board exams but will also help to crack the toughest medical entrance exams as well.
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