76. Which one of the following outer electronic configuration represents of group 16 (IV A) or chalcogens

1. 1. ns²np⁴

   
   
   

   2. ns²np⁵

   
   
   

   3. ns²np²

   
   
   

   4. ns²np³

   
   
   

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   NA

   Correct Option: A

   NA

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77. The oxidation state of oxygen in O₂F₂ is

1. 1. +1

   
   
   

   2. -2

   
   
   

   3. +2

   
   
   

   4. +4

   
   
   

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   NA

   Correct Option: A

   NA

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78. The decreasing order of catenation of group 16 element is

1. 1. S>Se>O>Te

   
   
   

   2. O>S>Se>Te

   
   
   

   3. O>S>Te>Se

   
   
   

   4. S>O>Se>Te

   
   
   

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   NA

   Correct Option: A

   NA

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79. An important method for the fixation of nitrogen is

1. 1. Haber's process

   
   
   

   2. Solvay's process

   
   
   

   3. Deacon's process

   
   
   

   4. Frusch's process

   
   
   

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   NA

   Correct Option: A

   NA

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80. The formula of sodium zeolite which is used in permutit process for softening water is

1. 1. Na₂OAI₂O₃Si₂O xH₂O

   
   
   

   2. Na₂OAI₂O₃SiO₄ xH₂O

   
   
   

   3. K₂AI₂SiO₈ xH₂O

   
   
   

   4. Na₂AI₂Si₂O₄ xH₂O

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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