Pick out from the following complex compounds, a poor electrolytic conductor in solution?

Options

A. (a) `K_2[PtCl_6]`
B. (b) `[Co(NH_3)_3(NO_2)_3]`
C. (c) `K_4[Fe(CN)_6]`
D. (d) `[Co(NH_3)_4]SO_4`

Answer

B

Explanation

`[Co(NH_3)_3(NO_2)_3]` There is no ions out of the coordination sphere thus it is poor conductor in electrolytic solution
`K_2[PtCl_6]=3ions`
`[Co(NH_3)_3(NO_2)_3]` =out of the coordination sphere no ions (non ionisable)
`K_4[Fe(CN)_6]=5ions`
`[Co(NH_3)_4].SO_4=2ions`
More ions `prop` more conductivity