[" 62mas "60" .Assuming complete ionization,same moles of which "],[" of the following compounds will require the least "],[" amount of acidfied "KMnO_(4)" for complete oxidation? "],[[" (1) FeC "_(2)O_(4)," (2) FelNO "_(2)/2],[" (3) FeSO,"," (4) FeSO "_(3)]],[[" (3) FeSO,"," (4) FeSO "_(3)]],[" (3) FeSO,"," (4) FeSO "_(3)]