The oxidation state of `Cr` in `[Cr(NH_(3))_(4)Cl_(2)]^(+)` is:

The oxidation number of Cr in [Cr(NH_(3))_(6)]Cl_(3) is

The oxidation state of Cr in Cr_(2)O_(7)^(2-) is

The oxidation states of Cr in [Cr(H_(2)O)_(6)]Cl_(3). [Cr(C_(6)H_(6))_(2)] and K_(2)[Cr(CN)_(2)(O)_(2)(O_(2))(NH_(3))] respectively are

The oxidation number of Cr in [Cr(NH_3)_6]Cl_3 is

The oxidation of Cr in the complex [Cr(H_(2)O)_(4)Cl_(2)]^(+) is

The oxidation state of Cr in K_(2)Cr_(2)O_(7) is: