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Which substance is serving as a reducing...

Which substance is serving as a reducing agent in the following reaction?
`14H^(+)+Cr_(2)O_(7)^(2-)+3Ni rarr 2Cr^(3+)+7H_(2)O+3Ni^(2+)`

A

`H_(2)O`

B

Ni

C

`H^(+)`

D

`Cr_(2)O_(7)^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
B
The oxidation number of Ni changes from 0 to +2.
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Knowledge Check

  • In the following reaction 2I- + Cr_(2)O_(7)^(2-)+14H^(+) rarr I_(2)+2Cl^(3)+7H_(2)O Unbalanced parts are

    A
    `H^(+)`, `H_(2)O`
    B
    `Cr_(2)O_(7)^(2-)`, `Cr^(3+)`
    C
    `I^(-)`, `I_(2)`
    D
    None of them are balanced

  • The value of n in the following equation is Cr_(2)O_(7)^(2-)+14H^(+)+"ne"to2Cr^(3+)+7H_(2)O+

    A
    6
    B
    2
    C
    3
    D
    4

  • The values of n in the following equation is Cr_(2)O_(7)^(2-) + 14H^(+) + nFe^(2+) to 2Cr^(3-) + nFe^(3+) + 7H_(2)O

    A
    4
    B
    3
    C
    7
    D
    6

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