146. The chemical used for cloud seeding for artificial rains is
     

1. 1. Silver Nitrate
      

   
   
   

   2. Potassium Bromide
      

   
   
   

   3. Silver Iodide
      

   
   
   

   4. Potassium Nitrate

   
   
   

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1. View Hint View Answer Discuss in Forum

   The chemical used for cloud seeding for artificial rains is silver iodide.
   

   Correct Option: C

   The chemical used for cloud seeding for artificial rains is silver iodide.
   

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147. Electric fuse is an alloy of
     

1. 1. tin and lead
      

   
   
   

   2. zinc and lead
      

   
   
   

   3. copper and iron
      

   
   
   

   4. carbon and tin

   
   
   

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1. View Hint View Answer Discuss in Forum

   Electric fuse is an alloy of tin and lead.
   

   Correct Option: A

   Electric fuse is an alloy of tin and lead.
   

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148. Maximum permissible concentration of total hardness in drinking water is
     

1. 1. 50
      

   
   
   

   2. 100
      

   
   
   

   3. 200
      

   
   
   

   4. 500

   
   
   

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1. View Hint View Answer Discuss in Forum

   Maximum permissible concentration of total hardness in drinking water in 200.

   Correct Option: C

   Maximum permissible concentration of total hardness in drinking water in 200.

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149. The sewage obtained from water closets and urinals is known as
     

1. 1. Sanitary waste
      

   
   
   

   2. Industrial waste
      

   
   
   

   3. Garbage
      

   
   
   

   4. Sullage

   
   
   

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1. View Hint View Answer Discuss in Forum

   The sewage obtained from water closets and urinals in known as Sanitary waste.

   Correct Option: A

   The sewage obtained from water closets and urinals in known as Sanitary waste.

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150. Synthetic detergents are made from
     

1. 1. Sodium stearate
      

   
   
   

   2. Sodium salt of benzene sulphonic acid
      

   
   
   

   3. Sodium salt of benzene carboxylic acid
      

   
   
   

   4. Sodium palmitate

   
   
   

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1. View Hint View Answer Discuss in Forum

   Synthetic detergents are made from sodium salt of benezene sulphonic acid.

   Correct Option: B

   Synthetic detergents are made from sodium salt of benezene sulphonic acid.

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