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Question

What happens to p H of a solution when N H subscript 4 end subscript C l crystal is added to a dilute solution of N H subscript 4 end subscript O H?

  1. Decreases    
  2. Increases    
  3. Remains unaffected    
  4. All of these    

The correct answer is: Decreases


    Due to common ion effect, dissociation of N H subscript 4 end subscript O H decreases and thus, p O H increases or p H decreases.

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