Rajasthan Board Class 12 Question Paper 2020 EVS

 Roll No.

No. of Questions – 30
No. of Printed Pages – 7

  (ENVIRONMENTAL SCIENCE)
  , 2020
 3¼ 
 56

     
GENERAL INSTRUCTIONS TO THE EXAMINEES :

(1)    -     
Candidate must write first his / her Roll No. on the question paper compulsorily.

(2)      
All the questions are compulsory.

(3)       -    
Write the answer to each question in the given answer-book only.

(4)      ,         
For questions having more than one part, the answers to those parts are to be written
together in continuity.

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(5) -    
       //      
    
If there is any error / difference / contradiction in Hindi & English versions of the
question paper, the question of Hindi version should be treated valid.

(6)     
1 – 13 1
14 – 24 2
25 – 27 3
28 – 30 4
Q. Nos. Marks per question
1 – 13 1
14 – 24 2
25 – 27 3
28 – 30 4

(7)   28  30     
There are internal choices in Q. Nos. 28 to 30.

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 – 
SECTION – A

1.      
Define Water Pollution. 1

2.        
Write two examples of Renewable Natural Resources. 1

3.          ?
In which year The Environment Protection Act was implemented ? 1

4. NAPCC     

Write full name of NAPCC. 1

5.                
Write the name of a chemical group thats production is to be reduced under Montreal
Protocol. 1

6.              
Write any one of the problems that is faced in enforcement of Environmental Legislation. 1

7.              ?
Which article in Indian Constitution is related with protection and improvement of
Environment ? 1

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8.                    
Name the disinfectant which is used to treat the pathogens present in water. 1

9.     
Define Vermicomposting. 1

10.            
Give any one example of micro-organism used for Xenobiotics degradation. 1

11.           ?
What slogan has been given by women during Chipko movement ? 1

12. “  ”        ?
Which gas is leaked in “Bhopal Gas Tragedy” ? 1

13.         
Give an example of Natural physical disaster. 1

 - 
SECTION – B

14.          
Give any two ill effects of acid rain. 1+1=2

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15.       
Write four sources of soil pollution. 4½=2

16.            
Write two diseases caused due to depletion of Ozone layer. 1+1=2

17.         
Write any two functions of the Bureau of Indian Standards (BIS). 1+1=2

18.       
Write two advantages of Green Belts. 1+1=2

19.        
Explain Aerobic treatment theory by giving diagram. 2

20. -  -   -   
Give two examples of each Biodegradable and Non-biodegradable wastes. 4½=2

21.          
Write four human activity responsible for soil erosion. 4½=2

22.         
Explain two methods of Rain water conservation. 1+1=2

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23.              
What is impact of urbanization on Environment ? Explain any two reasons. 1+1=2

24.        
Write any four objectives of environment education. 4½=2

 – 
SECTION – C
25. -   (BOD)         
Define Biochemical Oxygen Demand (BOD). Explain its importance. 1+2=3

26. -              
Describe in brief three efforts adopted for energy conservation. 1+1+1=3

27.  () , 1980     
Explain three specialities of Forest (conservation) Act, 1980. 1+1+1=3

 – 
SECTION – D
28.               

               
Define Air Pollutants. Describe any three sources of Air Pollution. 1+3=4
OR
Define Noise Pollution. Describe three ill effects of Noise Pollution.

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29.   () , 1972      

    51-     
Write objectives and features of The Wild Life (Protection) Act, 1972. 4

OR
Explain Fundamental Duties of Article 51-A of Indian Constitution.

30.    (GMO’s)     

         
Give a brief note on Genetically Modified Organism (GMO’s) 41=4

OR
Describe any four methods of Pest Management Techniques.
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