86. Assertion (A) : Only a minute portion of solar radiation is intercepted by the earth.
    Reason (R) : Other planets are obstructing the path of sun ray's

1. 1. Both (A) and (R) are correct and (R) explains (A)

   
   
   

   2. Both (A) and (R) are correct but (R) does not explain (A)

   
   
   

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

   
   
   

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

   
   
   

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   NA

   Correct Option: C

   NA

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87. Assertion (A) : The composition of the lowest layer of the atmosphere remains relatively constant.
    Reason (R) : There is intensive mixing and circulation in the lower layers of the atmosphere.

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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   NA

   Correct Option: A

   NA

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88. What are Chinooks ?

1. 1. Cold local winds which blow from north - west to south - east direction in Spain

   
   
   

   2. Extremely dry winds blowing from north - east and east to west in eastern parts of Sahara desert

   
   
   

   3. Warm and dry winds which blow down the eastern slopes of Rocky Mountains of North America

   
   
   

   4. Warm and dry winds along the northern slopes of Alps Mountains

   
   
   

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   NA

   Correct Option: C

   NA

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89. Arrange the constituent gases of the atmosphere in descending order of their percentage to the total composition of the atmosphere.
    1. Nitrogen
    2. Oxygen
    3. Argon
    4. Carbon dioxide
    Code

1. 1. 1-2-4-3

   
   
   

   2. 1-4-2-3

   
   
   

   3. 1-2-3-4

   
   
   

   4. 1-4-3-2

   
   
   

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   NA

   Correct Option: A

   NA

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90. What is the characteristic of planetary winds

1. 1. These flow from the belts of high pressure to the belts of low pressure

   
   
   

   2. These flow from the belts of low pressure to the belt of high pressure

   
   
   

   3. These do not flow to any centre of pressure

   
   
   

   4. None of these

   
   
   

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   NA

   Correct Option: A

   NA

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