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E^(@) for two reactions are given below ...

`E^(@)` for two reactions are given below : `Cr^(+3) + 3e^(-) to Cr , E^(@) = - 0.74 V `
`Ocl^(-) + H_2O + 2e^(-) to Cl^(-) + 2OH^(-) , 2OH , E^(@) = 0.94 V `
What will be the `E^(@)` for `3OCl^(-) + 2Cr + 3H_2O to 2Cr^(+3) + 3Cl^(-) + 6OH^(-)`

A

`-1.68 V `

B

`1.68 V `

C

`-0.20 V `

D

`+ 0.20 V `

Text Solution

Verified by Experts

The correct Answer is:
B
` 2 xx 3 xx E^(0) = -(-0.74 xx 3 xx 2) + (0.94 xx 2 xx 3) , E^(0) = 0.74 + 0.94 = 1.68V`
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AAKASH SERIES-ELECTROCHEMISTRY -LEVEL-II (LECTURE SHEET ( EXERCISE -I ( SINGLE & ONE OR MORE THAN ONE CORRECT ANSWER )))
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