A) \[[Co{{(N{{H}_{3}})}_{6}}]C{{l}_{3}}\]
B) \[[Co{{(N{{H}_{3}})}_{5}}Cl]C{{l}_{2}}\]
C) \[[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]Cl\]
D) \[[Co{{(N{{H}_{3}})}_{3}}C{{l}_{3}}]\]
Correct Answer: D
Solution :
\[[Co(N{{H}_{3}})C{{l}_{3}}]\]does not give a precipitate with \[\text{AgN}{{\text{O}}_{\text{3}}}\]solution because in it all the chlorine atoms are attached by secondary valencies.
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