1.

In which of the following ionic radii of chromium would be smallest

Answer»

`K_(2)CrO_(4)`
`CrO_(2)`
`CrCl_(3)`
`CrF_(2)`

Solution :Oxidation number of Cr in OPTIONS a, b, c and d are `+6,+4, +3, +3` RESPECTIVELY.
In given options (a) has high oxidation number therefore its radii with be low. Atomic radii decreases with increase in oxidation no.


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