question_answer

The standard reduction potentials at \[298\,K\]for the following half reactions are given against each                 \[Z{{n}^{2+}}(aq.)+2e\]⇌\[Zn(s)\];      ? 0.762                 \[C{{r}^{3+}}(aq)+3e\]⇌\[Cr(s)\];         ? 0.740                 \[2{{H}^{+}}(aq)+2e\]⇌\[{{H}_{2}}(g)\];             0.00                 \[F{{e}^{3+}}(aq)+e\]⇌\[F{{e}^{2+}}(aq)\];     0.770                 Which is the strongest reducing agent [IIT 1981; MP PET/PMT 1988; MP PMT 1989;  MH CET 2001]

A)                 \[Zn(s)\]             

B)                 \[Cr(s)\]

C)                 \[{{H}_{2}}(g)\]

D)                 \[F{{e}^{2+}}(aq)\]