271. Which of the following statements about westerlies is not correct

1. 1. They blow from subtropical high to equatorial low

   
   
   

   2. Westerlies of southern hemisphere are stronger

   
   
   

   3. In Northern hemisphere they blow from south-west to north-east

   
   
   

   4. They are also known as roaring forties, furious fifties, shrieking sixties

   
   
   

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   NA

   Correct Option: A

   NA

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272. 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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273. 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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274. 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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275. Consider the following statements
     1. Nearly 99 percent of the total mass of the atmosphere lies within 30 km of the earth's surface.
     2. The proportion of ozone in the atmosphere increases to a maximum at about 60km from earth's surface.
     Which of the statements given above is / are correct ?

1. 1. 1 only

   
   
   

   2. 2 only

   
   
   

   3. Both 1 and 2

   
   
   

   4. neither 1 nor 2

   
   
   

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   NA

   Correct Option: A

   NA

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