Discussion Forum



1)

A coordination complex compound of cobalt has a molecular formula containing five ammonia molecules, one nitro group, and two chlorine atoms for one cobalt atom. One mole of this compound produces three mole ions in an aqueous solution; on reacting with excess of AgNO3, AgCl is precipitated. The ionic formula for this complex would be:


A) $\left[Co(NH_{3})_{5}NO_{2})\right]Cl_{2}$

B) $\left[Co(NH_{3})_{5} Cl \right]\left[Cl(NO_{2})\right]$

C) $\left[Co(NH_{3})_{4}NO_{2})Cl\right] \left[(NH_{3})Cl\right]$

D) $\left[Co(NH_{3})_{5}\right]\left[(NO_{2})_{2}Cl_{2}\right]$

Answer:

Option A

Explanation:

The most probable complex which gives three mole ions in aqueous solution maybe 

$\left[Co(NH_{3})_{5}NO_{2})\right]Cl_{2}$