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) All of these
Correct Answer: B
Solution :
In \[{{[Co{{(N{{H}_{3}})}_{5}}\,Cl]}^{+2}}\] complex ion carries +2 charge so primary valency is +2.
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