Q5
S†an dard electrode potentials are : Fe^{2+}\vert Fe (E^0=-0.44),Fe^{3+}\vert Fe^{2+}(E^0=0.77V) Fe^{2+},Fe^{3+} and Fe blocks are kept together then (1) Fe^{3+ }increases (2) Fe^{2+ }increases (3) Fe^{2+}/Fe^{3+ }remains unchanged (4) Fe^{2+ }deccreased