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Raghavan Prasad Hayer
Asked: 2022-11-09T04:26:53+05:30 In:

For the redox reaction
`Cr_(2)O_(7)^(-2)+H^(+)+Ni rarr Cr^(3)+Ni^(2+)+H_(2)O`
The correct coefficents of the reactions for the balanced reaction are
A. (`Cr_(2)O_(7)^(2-)=1`, `Ni=3`, `H^(+)=14`)
B. (`Cr_(2)O_(7)^(2-)=2`, `Ni=3`, `H^(+)=14`)
C. (`Cr_(2)O_(7)^(2-)=1`, `Ni=1`, `H^(+)=16`)
D. (`Cr_(2)O_(7)^(2-)=3`, `Ni=3`, `H^(+)=12`)

For the redox reaction
`Cr_(2)O_(7)^(-2)+H^(+)+Ni rarr Cr^(3)+Ni^(2+)+H_(2)O`
The correct coefficents of the reactions for the balanced reaction are
A. (`Cr_(2)O_(7)^(2-)=1`, `Ni=3`, `H^(+)=14`)
B. (`Cr_(2)O_(7)^(2-)=2`, `Ni=3`, `H^(+)=14`)
C. (`Cr_(2)O_(7)^(2-)=1`, `Ni=1`, `H^(+)=16`)
D. (`Cr_(2)O_(7)^(2-)=3`, `Ni=3`, `H^(+)=12`)
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1 Answer

  1. Correct Answer – A
    The balanced equation is
    `Cr_(2)O_(7)^(2-)+14H^(+)+3Ni rarr 2Cr^(3+)+7H_(2)O+3Ni^(2+)`

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