1. Bar is a unit of

1. 1. pressure

   
   
   

   2. force

   
   
   

   3. energy

   
   
   

   4. frequency

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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2. Sodium carbonate crystals lose water molecules. This property is called

1. 1. hygroscopy

   
   
   

   2. deliquescence

   
   
   

   3. efflorescence

   
   
   

   4. none of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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3. 'Misch metal' is widely used in manufacture of which of the following

1. 1. material of car brake

   
   
   

   2. smoke detectors

   
   
   

   3. cigarette lighters

   
   
   

   4. emergency lights

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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4. The law of constant proportions was enunciated by

1. 1. Dalton

   
   
   

   2. Berthelot

   
   
   

   3. Avogadro

   
   
   

   4. Proust

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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5. The total number of electrons present in 18ml of water (density of water is 1g/ml)

1. 1. 6.02 x 10²⁰

   
   
   

   2. 6.02 x 10²³

   
   
   

   3. 6.02 x 10²⁴

   
   
   

   4. 6.02 x 10²⁶

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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