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The standard reduction potentials at 298...

The standard reduction potentials at `298K` for the following half reactions are given against each

Which is the strongest reducting agent?

A

`Zn(s)`

B

`Cr(s)`

C

`H_(2)(s)`

D

`Fe^(2+)(aq)`

Text Solution

Verified by Experts

The correct Answer is:
a
`Zn` is the strongest reducing agent among the given options. The substance having smaller value of reduction potential are better reducing agents.
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Knowledge Check

  • The standard reduction potentials at 298 K for the following half reactions are given against each Zn^(2+) (aq) + 2de hArr Zn(s) - 0.762 Cr^(3+)(aq) + 3e hArr Cr(s) - 0.74 2H^(+)(aq) + 2e hArr H_(2)(g) 0.00 Fe^(3+)(aq) + e hArr Fe^(2+)(aq) 0.77 Which is the stronger reducing agent ?

    A
    `Fe^(2+)(aq)`
    B
    `H_(2)(g)`
    C
    `Cr(s)`
    D
    `Zn(s)`

  • The reduction potential of NCE at 298 K is

    A
    0.3338 V
    B
    0.2415 V
    C
    0.28 V
    D
    0.76 V

  • The standard reduction potentials at 25^(@)C for the following half reactions are given against each: Zn^(2+) (a.q) + 2e^(-) hArr Zn (s) : " " - 0.762 Cr^(3+) (a.q) 3e^(-) hArr Cr (s) , " " - 0.740 2H^(+) + 2e^(-) hArr H_(2) (g), " " 0.00 Fe^(3+) + e^(-) hArr Fe^(2+) , " " 0.77 Which is the strongest reducing agent?

    A
    `Zn`
    B
    `Cr`
    C
    `H_(2)(g)`
    D
    `Fe^(2+) (aq)`

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