1.

Which of the fo llowing reaction is possible at anode?

Answer»

`2Cr^(3+)+ 7H_(2)OTO Cr_(2)O_(7)^(2-) +14H^(+)`
`F_(2) to 2F^(-)`
`(1//2) O_(2)+ 2H^(+) to H_(2)O`
None of these

Solution :`2Cr^(3+) +7H_(2)OtoCr_(2)O_(7)^(2-) +14H^(+)`
O.S. of CR changes from +3 to +6 by LOSS of electrons. At anode oxidation takes place.


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