1.

Coordination number of Cris six. A complex ion of Cr with C_(2)O_(4)^(2-), en and superoxide ion O_(2)^(-) has the formula [Cr(C_(2)O_(4))x(en)_(y)(O_(2))_(z)]^(-). The ratio x : y : z will be

Answer»

`1 : 1 : 1`
`1 : 1 : 2`
`1 : 2 : 2`
`2 : 1 : 1`

Solution :x : y : Z should be such that total CHARGE =-1 (i.e. charge on the complex ION).
For (a)
total charge = + 3 + 1 (-2) + 1(0) + 1 (-1)=0
For (b),
Total charge = + 3 + 1 (-2) + 1 (0) + 2 (-1) =-1.


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