1.

The standard reduction potential at 290K for the following half reactions are, (i)Zn^(2+) +2e rarrZn(s),E^@ =-0.762 V (ii)Cr^(3+) +3e rarr Cr(s), E^@=-0.740 V (iii)2H^+ 2e rarrH_2(g),E^@=-0.000V (iv)Fe^(3+) +e rarr Fe^2+,E^@=+0.77V Which it the strongest reducing agent :

Answer»

Zn
Cr
`FE^(2+)`
`H_2`

ANSWER :A


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