Q.

Aqueous solution of AgNO3 is electrolysed using inert electrodes. At the end of electrolysis 

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a

pH of the solution decreases

b

pH of the solution increases

c

pH of the solution remains unchanged

d

pH of the solution becomes 14

answer is B.

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Detailed Solution

  • When aqueous solution of AgNO3 is electrolysed using inert electrodes. the reaction taking place are ;
  • AgNO3(aq) Ag++NO3-+H++OH-  Cathode :Ag++e-Ag Anode:4OH-2H2O +O2+4e- H++NO3-HNO3
  • As HNO3 is formed , pH of the solution decreases at the end. 
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