21. Assertion (A) : Laterite, the typical soil of tropical region, is rich in oxides of iron and aluminium compounds.
    Reason (R) : Heavy rainfall promotes leaching of lime and silica content of the soil.
    Code

1. 1. Both (A) and (R) are true and (R) is the correct explanation of (A)
      

   
   
   

   2. Both (A) and (R) are true but (R) is not the correct explanation of (A)
      

   
   
   

   3. (A) is true but (R) is false
      

   
   
   

   4. (A) is false but (R) is true
      

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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22. Consider the following statements
    1. Availability of cheap alternatives
    2. Changing food habit
    3. Indiscriminate fishing
    4. Overfishing
    5. Water pollution
    Of these statements

1. 1. 1, 2 and 3 are correct

   
   
   

   2. 2, 3 and 4 are correct

   
   
   

   3. 1, 4 and 5 are correct

   
   
   

   4. 3, 4 and 5 are correct

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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23. Consider the following statements
    1. Availability of cheap alternatives
    2. Changing food habit
    3. Indiscriminate fishing
    4. Overfishing
    5. Water pollution
    Of these statements

1. 1. 1, 2 and 3 are correct

   
   
   

   2. 2, 3 and 4 are correct

   
   
   

   3. 1, 4 and 5 are correct

   
   
   

   4. 3, 4 and 5 are correct

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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24. Match List - I (Soil type) with List - II (Region) and select The correct answer using the codes given below the lists
    

    	List - I		List - II
    F.	Chernozems	1.	Eastern Romania
    G.	Laterite	2.	Northern plains of India
    H.	Podzol	3.	Central Africa
    J.	Alluvial	4.	Eastern Russia

    Code :

    	F	G	H	J
    A.	1	3	4	2
    B.	4	3	2	1
    C.	1	4	3	2
    D.	4	3	2	1

1. 1. A.

   
   
   

   2. B.

   
   
   

   3. C.

   
   
   

   4. D.

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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25. What happens to the soil, where soil water freezes and it tends to form ice layers parallel with the ground surface ?

1. 1. It heaves the soil upward in an uneven manner

   
   
   

   2. It heaves the soil downward in an uneven manner

   
   
   

   3. It heaves the soil both upward and downward in an even manner

   
   
   

   4. It remains unaffected

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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