96. The jet aircrafts fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation ?
    1. There are no clouds or water vapour in the lower stratosphere.
    2. There are no vertical winds in the lower stratosphere.
    Which of the statements given above is / are correct in this context ?

1. 1. 1 only

   
   
   

   2. 2 only

   
   
   

   3. Both 1 and 2

   
   
   

   4. Neither 1 nor 2

   
   
   

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   NA

   Correct Option: C

   NA

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97. Assertion (A) : Within the mesosphere, temperature decreases with increasing altitude.
    Reason (R) : This is due to deveasing solar heating and increasing cooling by CO₂ radiative emission
    

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

   
   
   

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

   
   
   

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

   
   
   

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

   
   
   

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   NA

   Correct Option: A

   NA

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98. Assertion (A) : The moist adiabatic lapse rate is lower than the dry adiabatic lapse rate.
    Reason (R) : When condensation begins, the latent heat of condensation is released in the parcel of air.

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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99. The rainy day as defined by the Indian Meteorological department is a day when the rainfall at a point received is

1. 1. 0.5 mm to 1 mm in 24 hrs

   
   
   

   2. 1.5 mm to 2 mm in 2.4 hrs

   
   
   

   3. 1.1 mm to 1.5 mm in 24 hrs

   
   
   

   4. Above 2.5 mm in 24 hrs

   
   
   

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   NA

   Correct Option: D

   NA

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100. Which of the following statement about Troposphere is / are true

1. 1. It extends from ground level up to about 16 km (10 miles) at the equator, and to 9 km (5 miles) at the North and South Poles

   
   
   

   2. Changing conditions in the Troposphere result in our weather

   
   
   

   3. Temperature decreases with increasing altitude and contains more air molecules than all the other layers combined

   
   
   

   4. All of the above

   
   
   

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   NA

   Correct Option: D

   NA

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