Q.
The standard (reduction) electrode potentials for metal-metal ion (M/M2+) electrodes P,Q,R and S are respectively −0.44V,+0.34V,−0.76V and −0.25V The increasing order of their reducing capacities is
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J & K CETJ & K CET 2016Redox Reactions
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Solution:
More negative the reduction potential of a metal, higher is its reducing capacity. Therefore, the increasing order of reduction capacities is Q+0.34V<S−0.25V<P−0.44V<R−0.76V