1.

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 areA. `+3, +2` and `+4`B. `+3, 0` and `+6`C. `+3, 0 ` and `+4`D. `+3, +4` and `+6`

Answer» Correct Answer - B
`[Cr(H_(2)O)_(6)]Cl_(3)`
`rArr x+0xx6-1xx3=0`
or `x=+3`
`[Cr(C_(6)H_(6))_(2)]`
`rArr x+2xx0=0`
or `x=0`
`[Cr(CN)_(2)(O)_(2)NH_(3)]^(2-)`
`x+2(-1)+2(-2)+2(-1)+0=-2`
`x-2-4-2=-2 or x=+6`


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