16. 'White lung cancer' is caused by

1. 1. asbestos

   
   
   

   2. silica

   
   
   

   3. textiles

   
   
   

   4. paper

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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17. Depletion of ozone layer causes

1. 1. blood cancer

   
   
   

   2. lung cancer

   
   
   

   3. skin cancer

   
   
   

   4. breast cancer

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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18. Saline soil contains

1. 1. high concentration of salt

   
   
   

   2. lot of moisture

   
   
   

   3. hard rocks

   
   
   

   4. none of the above

   
   
   

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   NA

   Correct Option: A

   NA

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19. A fertile soil is likely to have a pH of

1. 1. 3

   
   
   

   2. 9

   
   
   

   3. 6-7

   
   
   

   4. 14

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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20. Higher concentration of nitrogen dioxide in atmosphere air causes

1. 1. cancer

   
   
   

   2. bronchitis

   
   
   

   3. asphyxiation

   
   
   

   4. corrosion

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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