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An aqueous solution of CoCl(2) on additi...

An aqueous solution of `CoCl_(2)` on addition of excess of conc. `HCl` turns blue due to formation of

A

`[Co(H_(2)O)_(4)Cl_(2)]`

B

`[Co(H_(2)O)_(2)Cl_(4)]^(2-)`

C

`[CoCl_(4)]^(2-)`

D

`[Co(H_(2)O)_(2)Cl_(2)]`

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