51. The hydrogen bond is strongest in which one of the following

1. 1. F - H --- F

   
   
   

   2. O - H ---- O

   
   
   

   3. S - H ---- F

   
   
   

   4. F - H ---- O

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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52. When ether is exposed in air for sometime, and explosive substance is produced, the substance is

1. 1. Peroxide

   
   
   

   2. TNT

   
   
   

   3. Oxide

   
   
   

   4. Superoxide

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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53. Which of the following is produced by coaltar ?

1. 1. Drugs

   
   
   

   2. Synthetic dyes

   
   
   

   3. Perfumes

   
   
   

   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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54. Rochelle's salt is

1. 1. Sodium potassium tartrate

   
   
   

   2. Sodium tartrate

   
   
   

   3. Potassium tartrate

   
   
   

   4. Calcium tartrate

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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55. A sample of chloroform before using as an anaesthetic, is tested by

1. 1. Fehling's solution

   
   
   

   2. Ammonical cuprous chloride

   
   
   

   3. Ammonical silver nitrate solution

   
   
   

   4. Silver nitrate solution after boiling with alcoholic KOH

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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