11. Oxidation number of N in NH₄NO₃ is

1. 1. -3

   
   
   

   2. +5

   
   
   

   3. -3 and +5

   
   
   

   4. +3 and -5

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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12. The conversion of Fe⁺⁺ to Fe⁺⁺⁺ is

1. 1. oxidation

   
   
   

   2. reduction

   
   
   

   3. ionisation

   
   
   

   4. nuclear reaction

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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13. Starch iodide paper is used to test for the presence of

1. 1. iodine

   
   
   

   2. iodide iron

   
   
   

   3. oxidising agent

   
   
   

   4. reducing agent

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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14. What is the oxidation number of sulphur in SO^2-₄ ion

1. 1. -2

   
   
   

   2. +2

   
   
   

   3. +6

   
   
   

   4. 8

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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15. The oxidation state of phosphorus varies from

1. 1. -1 to +1

   
   
   

   2. -3 to +3

   
   
   

   3. -3 to 5

   
   
   

   4. -5 to +1

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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