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Effects of Pollution, Class 11 Chemistry NCERT Solutions

1. There will be total 10  MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying.

1. Ozone in the stratosphere is a product of UV radiations acting on:
 
 
 
 

Question 1 of 10

2. The main reason of ozone layer depletion is the release of:
 
 
 
 

Question 2 of 10

3. Human excreta contains bacteria which causes gastrointestinal diseases are:
 
 
 
 

Question 3 of 10

4. Earth is protected from UV radiation by a layer of:
 
 
 
 

Question 4 of 10

5. Clean water and highly polluted water have BOD:
 
 
 
 

Question 5 of 10

6. The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water is called:
 
 
 
 

Question 6 of 10

7. A synthetic toxic chemical with ecological repercussions is:
 
 
 
 

Question 7 of 10

8. Oxidation of ethene in the presence of ionic catalyst in aqueous medium produces:
 
 
 
 

Question 8 of 10

9. Industrial solid wastes are sorted out as:
 
 
 
 

Question 9 of 10

10. In winter polar Stratospheric clouds provide surface on which chlorine nitrate formed get hydrolysed to form:
 
 
 
 

Question 10 of 10