Four successive members of the first row transition elements are listed below with atomic numbers. Which one of them is expected to have the highest $E^o_{M^{3+} /M^{2+}}$ value ?
$Cr\,(Z=24)$
$Mn\,(Z = 25)$
$Fe\,(Z=26)$
$Co\,(Z = 27)$
Explain why $Cu ^{+}$ ion is not stable in aqueous solutions?
Which one of the following metals will not reduce ${H_2}O$
Which of the following ions is paramagnetic
Bell metal is an alloy of
The catalyst used in the contact process is