Standard reduction electrode potentials of three metals A, B and C are +0.5V, –3.0V and –1.2V respectively.

Answer: We have The lower the electrode potential, the stronger is the reducing agent. Therefore, the increasing order of the reducing power of the given metals is Ag < Hg <...

E0cell  =  E0 cathode  −  E0 anode

(c) either metals or non-metals 

(c) Generally, metals are ductile. However, mercury metal - a liquid at room temperature - cannot be drawn into wires and is not ductile.

Substances that are stronger oxidising agents than ferrous ions can oxidise ferrous ions. Fe2+ → Fe3+ + e-1  ;   Eø =  - 0.77 V This implies that the substances having higher reduction potentials than +0.77 V can...

your the answer A > D > B > C 

SHE, whose electrode potential is taken as zero.

The lower the reduction potential, the higher is the reducing power. The given standard electrode potentials increase in the order of K+/K < Mg2+/Mg < Cr3+/Cr < Hg2+/Hg < Ag+/Ag.  Hence,...

Increasing order of reducing power: Ag < Cu < Fe < Cr < Mg < K

The differences between electrolytic reduction and thermal reduction are- Thermal reduction Electrolytic reduction 1. carbon is used as a reduction agent.                           ...