MediumChemistry
+4 / -1
A metal X displaces nickel from nickel sulphate solution but does not displace manganese from manganese sulphate solution. What is the correct order of their reducing powers?
A
Ni > Mn > X
B
X > Mn > Ni
C
Mn > X > Ni
D
Mn > Ni > X
Explanation
Since X displaces Ni from NiSO4 solution, it means X has higher oxidation potential or lower reduction potential than Ni2+. Since X cannot displace Mn from MnSO4 solution, it means it has higher reduction potential than Mn2+. Lower the reduction potential, stronger is the reducing agent hence the correct order of reducing power Mn > X > Ni.
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