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Question

The standard reduction potentials at 298 K for the following half reactions are given:

Which is the strongest reducing agent?
Zn2+(aq.)+2eZn(s); 0.762
Cr3+(aq)+3eCr(s); 0.740
2H+(aq)+2eH2(g); 0.00
Fe3+(aq)+eFe2+(aq); 0.770

A
Zn(s)
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B
Cr(s)
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C
H2(g)
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D
Fe2+(aq)
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Solution

The correct option is A Zn(s)

More negative is the reduction potential, higher will be the reducing property, i.e. the power to give up electrons.


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