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The standard reduction potentials at 25^...

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(s)

B

Cr(s)

C

`H_2(g)`

D

`Fe_((aq))^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
A
Properties of ionic solid
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