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In acidic medium one mole of $MnO_4^-$ accepts how many moles of electrons in a redox process ?

$(a)\;1\qquad(b)\;5\qquad(c)\;3\qquad(d)\;6$

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Oxidation state of Mn changes from +7 to +2 in acidic medium i.e. one mole of it accepts 5 mole of electrons
Hence (b) is the correct answer.
answered Jan 30, 2014 by sreemathi.v
 

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