One mole of the coinplex compound `Co(NH_3)_5 Cl_3` gives three moles of ions on dissolution in water. One mole of the same complex reacts with two moles of `AgNO_3` solution to yield two moles of `AgCl(s)`. The structure of the complex is

Options

A. `[Co(NH_3)_5, Cl]Cl_2`
B. `[Co(NH_3)_3 Cl_3] . 2NH_3`
C. `[Co(NH_3)_4 Cl_2]Cl. NH_3`
D. `[Co(NH_3)_4 Cl]Cl_2. NH_3`

Answer

A

Explanation

This is because the group which is outside the square bracket (coordination.sphere) is precipitated out. `[Co(NH_3)_5 Cl]Cl_2 + AgNO_3 to [Co(NH3)5 Cl]^(2+) + AgCl darr`