16. When river water meets sea water delta formation takes place. It is due to the phenomenon of

1. 1. Dialysis

   
   
   

   2. Coagulation

   
   
   

   3. Electrophoresis

   
   
   

   4. Absorption

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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17. The catalyst used in the manufacture of sulphuric acid by contact process is

1. 1. AI₂O₃

   
   
   

   2. Cr₂O₃

   
   
   

   3. V₂O₅

   
   
   

   4. MnO₂

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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18. A catalyst poison is essntially

1. 1. A inhibitor

   
   
   

   2. An auto catalyst

   
   
   

   3. A heterogeneous catalyst

   
   
   

   4. A homogeneous catalyst

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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19. The decomposition of H₂O₂ is retarded by phosphoric acid. Thus phosphoric acid acts as

1. 1. Negative catalyst

   
   
   

   2. Positive catalyst

   
   
   

   3. Induced catalyst

   
   
   

   4. Auto catalyst

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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20. The diameter of colloidal particle ranges from

1. 1. 10^-9m to 10^-6 m

   
   
   

   2. 10^-6 to 10^-3 m

   
   
   

   3. 10^-12 m to 10^-9 m

   
   
   

   4. 10^-3m to 10^-6 m

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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