11. The law of relative lowering of vapour pressure was given by

1. 1. Van't Hoff

   
   
   

   2. Ostwald

   
   
   

   3. Lewis

   
   
   

   4. Raoult

   
   
   

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   NA

   Correct Option: D

   NA

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12. Which is not a colligative properties ?

1. 1. Osmotic pressure

   
   
   

   2. Relative lowering of vapour pressure

   
   
   

   3. Depression in fessing point

   
   
   

   4. Refraction index

   
   
   

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   NA

   Correct Option: D

   NA

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13. Which one is equal to the solution of morality in a molar solutions ?

1. 1. 1

   
   
   

   2. 2

   
   
   

   3. 3

   
   
   

   4. 4

   
   
   

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   NA

   Correct Option: A

   NA

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14. Saturated solution of NaCI on heating becomes

1. 1. Supersaturated

   
   
   

   2. Unsaturated

   
   
   

   3. Remains saturated

   
   
   

   4. None of these

   
   
   

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   NA

   Correct Option: B

   NA

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15. Which one is the heaviest ?

1. 1. 25 g Hg

   
   
   

   2. 2 moles of H₂O

   
   
   

   3. 2 moles of CO₂

   
   
   

   4. 4 g-atoms of O₂

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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