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Q)

The standard reduction potentials at 298K for following half reaction are given against each.
Zn+2(aq)+2e2n(s)=0.762
Cr+3(aq)+3eCr(s)=0.740
2H+(aq)+3eH2(g)=0
Fe+3(aq)+eFe+2(aq)=0.770.

Which is the strongest reducing agent ?

(a)Zn(s)(b)Cr(s)(c)H2(g)(d)Fe+2(aq)

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