1.

For the red ox reaction : Cr_2O_(7)^(2-) +I^(-) +H^(+) rarr Cr^(3+) + I_2 + H_2O the correct coefficients of the reactants for the balanced equation are

Answer»

`{:(Cr_(2)O_(7)^(2-),I^(-),H^(+)),(1,3,14):}`
`{:(Cr_(2)O_(7)^(2-),I^(-),H^(+)),(1,6,14):}`
`{:(Cr_(2)O_(7)^(2-),I^(-),H^(+)),(2,6,14):}`
`{:(Cr_(2)O_(7)^(2-),I^(-),H^(+)),(1,6,7):}`

Solution :(B) `Cr_2O_(7)^(2-) +14H + +6e^(-) RARR 2Cr^(3) + 7H_2O`
`[2I^(-) rarr I_2 +2E^(-)] x 3`
`Cr_2O_(7)^(2-) + 6I^(-) +14H^(+) rarr 2Cr^(3+) +3I_2 +7H_2O`


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