Which has maximum number of equivalents per mole of the oxidant ?
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a
I- aq + IO3-aq → I3-aq
b
Ag(s) + NO3- aq → NO2(g) + Ag+ (aq)
c
Mg(s) + VO43- aq → Mg2+(aq) + V2+ (aq)
d
Zn(s) + VO 2+ aq → V3+(aq) + Zn2+ (aq)
answer is A.
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Detailed Solution
Oxidant is the oxidizing agent (which has been reduced)(1) I+5O3-→I02 ; Change in ox. state = 5 = no.of equivalents per mole.(2) N+5O3-→N+4O2 ; Change in ox. state = 1(3) V+5O4-3→V+2 ; change in ox.state = 3(4) V+4O+2→V+3 ; change in ox.state =1