56. Milk can be preserved by adding a few drops of

1. 1. HCHO solution

   
   
   

   2. HCOOH solution

   
   
   

   3. CH₃CHO solution

   
   
   

   4. CH₃COOH solution

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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57. Colloidal solution commonly used in the treatment of eye disease is

1. 1. Colloidal silver

   
   
   

   2. Colloidal gold

   
   
   

   3. Colloidal antimony

   
   
   

   4. Colloidal sulphur

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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58. Which of the following colloidal solution is commonly used as germ killer ?

1. 1. Colloidal sulphur

   
   
   

   2. Colloidal gold

   
   
   

   3. Colloidal silver

   
   
   

   4. colloidal antimony

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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59. Scattering of light takes place in

1. 1. Electroplating

   
   
   

   2. Electrolysis

   
   
   

   3. Solutions of electrolyte

   
   
   

   4. Colloidal solution

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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60. Which of the following colloidal solution is used in photography ?

1. 1. Colloidal silver bromite

   
   
   

   2. Colloidal gold

   
   
   

   3. Colloidal silver

   
   
   

   4. Colloidal sulphur

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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