166. A gas that can not be collected over water is

1. 1. N₂

   
   
   

   2. O₂

   
   
   

   3. SO₂

   
   
   

   4. PH₃

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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167. Bleaching action of SO₂ is due to

1. 1. Oxidation

   
   
   

   2. Reduction

   
   
   

   3. Hydrolysis

   
   
   

   4. Electrolysis

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   NA

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168. SO₂ is not a

1. 1. Basic oxide

   
   
   

   2. Bleaching agent

   
   
   

   3. Disinfectant

   
   
   

   4. Reducing agent

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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169. Which one is the formula of bleaching powder ?

1. 1. CaCI₂

   
   
   

   2. CaO₂CI₂

   
   
   

   3. CaOCI₂

   
   
   

   4. CA(OCI)₂

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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170. Bleaching powder is obtained by the interaction of CI₂ and

1. 1. Dilute solution of Ca(OH)₂

   
   
   

   2. Dry CaO

   
   
   

   3. Conc. solution of Ca(OH)₂

   
   
   

   4. Dry slaked lime

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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