CBSE Class 12 Chemistry 2023 Delhi Set 1 Solved Paper

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Question : 4
Total: 35
Four half reactions I to IV are shown below:
I. 2ClCl2+2e
II. 4OHO2+2H2O+2e
III. Na++eNa
IV. 2H++2eH2
Which two of these reactions are most likely to occur when concentrated brine is electrolysed?
Explanation:
At anode 2ClCl2+2e
(2) At cathode
Na++eNa=Eo=2.71V
2H++2eH2,Eo=0~V
Those have high Eo value, that reaction will take place.
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