How can be the following pair of isomers be distinguished from one another
I `[Co(NH_(3))_(6)][Cr(NO_(2))_(6)]` and
(II) `[Cr(NH_(3))_(6)][Co(No_(2))_(6)]`
I `[Cr(NH_(3))_(6)[Cr(No_(2))_(6)]` and (II) `[Cr(NH_(3))_(4)(No_(2))_(2)][Cr(NH_(3))_(2)(NO_(2))_(4)]` .

Explanation

I can be distinguished from II by electrolysis of their aqueous solution .
`(I) overset(El ectrolysis)rarr[Co(NH_(3))_(6)]_((aq))^(3+)`
`[Co(NH_(3))_(6)]^(3+)` will migrate towards anode and is deposited on anode
`(II)rarr[Cr(NH_(3))_(6)]_((aq))^(3+)+[Cr(NO_(2))_(6)]_((aq))^(3-)`
on electrolysis, `[Cr(NH_(3))_(6)]^(3+)` ion will move towards anode and is deposited on anode
(I) and (II) can be distinguished by conducting measurements (I) will show conductivity as `(3+,3-1)` electrolyte whereas (II) will conduct clectricity as `(+1, -1)` electrolyte .