The complexes `[Co(NH_3)_6] [Cr(CN)_6] and [Cr(NH_3)_6] [Co(CN)_6]` are the examples of which type of isomerism ?

Options

A. by measurement of their conductivity
B. by titration method
C. by precipitation method with `AgNO_3`
D. by electrolysis of their aqueous solutions

Answer

D

Explanation

The given compounds are isomeric . They can be distinguished by electrolysis of their aqueous solution.
On electrolysis of its aqueous solution the complex ions of cobalt {i.e. `[Co(NH_3)_6]^(3+)` } of the complex `[Co(NH_3)_6][Cr(NO_2)_6]` moves towards cathode (i.e. , negative electrode) and on this electrode finally cobalt would be deposited.
On electrolysis of aqueous solution of the complex ion of chromium {i.e. `[Cr(NH_3)_6]^(3+)` } of the complex `[Cr(NH_3)_6][Co(NO_2)_6]` moves towards cathode (i.e. , negative electrode) and on this electrode chromium would finally be doposited.