Question
Example for a coordination compound is $........$

Answer

Carnallite: $\ce{KCl.MgCl_2​.6H_{2}O}$
Alum: $\ce{K_2​SO_4​Al_2​(SO_3​)24H_2​O}$
Ferrous ammonium sulphate: $\ce{(NH_4​)2​Fe(SO_4​)2​6H_2O}.$
All are double salts.
Only $\ce{[Co(NH_{3​})_6​].Cl_3​}$ is complex compound.

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