1.

In acidic medium " MnO"_(4)^(-) is an oxidising agent as " MnO"_(4)^(-) +8H^(+)+5e^(-) rarr Mn^(2+)+4H_(2) O. If H^(+) concentration is doubled, electrode potential of the half-cell " MnO"_(4)^(-)// " Mn"^(2+), Pt will :

Answer»

INCREASE by `28.46` m V
decrease by `28.46` m V
increase by `142.3` m V
decrease by `142.30` m V

Answer :A


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