11. The compound in which oxygen shows +2 oxidation state

1. 1. H₂O₂

   
   
   

   2. CaO

   
   
   

   3. H₂O

   
   
   

   4. F₂O

   
   
   

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   NA

   Correct Option: D

   NA

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12. Sulphur molecule is

1. 1. S₃

   
   
   

   2. S₂

   
   
   

   3. S₄

   
   
   

   4. S₈

   
   
   

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   NA

   Correct Option: D

   NA

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13. Ozone may not act as

1. 1. Bleaching agent

   
   
   

   2. Dehydrating agent

   
   
   

   3. Oxidising agent

   
   
   

   4. Reducing agent

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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14. H₂S₂O₈ is called

1. 1. Persulphuric acid

   
   
   

   2. Pyrosulphurus acid

   
   
   

   3. Pyrosulphuric acid

   
   
   

   4. Dithionic acid

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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15. Activated charcoal is employed to remove colouring matter from pure substance, it works by

1. 1. Bleaching

   
   
   

   2. Oxidation

   
   
   

   3. Reduction

   
   
   

   4. Adsorption

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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