6. Which of the following gas do not considered as polluting agent of air ?

1. 1. CO₂

   
   
   

   2. CO

   
   
   

   3. NO₂

   
   
   

   4. SO₂

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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7. Water pollution of a river is measured by

1. 1. Amount of chlorine dissolve in water

   
   
   

   2. Amount of ozone dissolve in water

   
   
   

   3. Amount of nitrogen dissolve in water

   
   
   

   4. Amount of oxygen dissolve in water

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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8. Domestic waste constitutes

1. 1. Non-biodegradable pollution

   
   
   

   2. Biodegradable pollution

   
   
   

   3. Effluents

   
   
   

   4. Air pollution

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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9. Ozone day is

1. 1. January, 30

   
   
   

   2. September, 16

   
   
   

   3. April, 21

   
   
   

   4. December, 25

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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10. Ozone hold is maximum over

1. 1. Europe

   
   
   

   2. Antarctica

   
   
   

   3. India

   
   
   

   4. Africa

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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