21. Which one is not a colloidal solution ?

1. 1. Smoke

   
   
   

   2. Air

   
   
   

   3. Ink

   
   
   

   4. Blood

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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22. The catalysis used in Zeigler process for polyethylene manufacture

1. 1. Consists of aluminium triethyl and titanium tetrachoride

   
   
   

   2. Is vanadium pentoxide

   
   
   

   3. Consists of aluminium chloride and titanium dioxide

   
   
   

   4. Is finely divided nickel

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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23. Reverse of swelling of gel is known as

1. 1. Syneresis

   
   
   

   2. Thizotropy

   
   
   

   3. Sorption

   
   
   

   4. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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24. The enzyme ptyalin used for digestion of food is present in

1. 1. Saliva

   
   
   

   2. Blood

   
   
   

   3. Intestine

   
   
   

   4. Adneral gland

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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25. On which of the following factors of gas the extent of absorption of a gas on a solid depends upon ?

1. 1. Temperature

   
   
   

   2. Nature

   
   
   

   3. Pressure

   
   
   

   4. (a), (b) & (c) All

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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