36. The Haffkine institute, mumbai is known for its workon the production of

1. 1. plague vaccine

   
   
   

   2. Leprosy vaccine

   
   
   

   3. Tetanus vaccine

   
   
   

   4. Polia vaccine

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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37. The smog is essentially caused by the presence of

1. 1. O₃ and N₂

   
   
   

   2. O₂ and N₂

   
   
   

   3. Oxides of N and S

   
   
   

   4. O₂ and O₃

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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38. Physico-chemical characteristics of water in water sources undergo changes due to

1. 1. aquatic macrophytes

   
   
   

   2. auatic fungi

   
   
   

   3. effluents

   
   
   

   4. evapotranspiration

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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39. Which is not a green house gas ?

1. 1. CO₂

   
   
   

   2. CH₄

   
   
   

   3. N₂O

   
   
   

   4. Chlorofluorocarbons

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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40. The increasing abundance of green house gases in atmosphere has led to the following effect except

1. 1. Global warming

   
   
   

   2. Depletion of ozone layer in the stratosphere

   
   
   

   3. Oxygen fertilization effect

   
   
   

   4. Carbon dioxide ferilization effect

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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