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  4. The oxidation number of chromium in sodium tetrafluorido oxochromate complex is

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Q. The oxidation number of chromium in sodium tetrafluorido oxochromate complex is

Coordination Compounds

Solution:

$Na_{2} [CrF_{4}O]$
$x +4 (-1) + (-2) = -2$
$x - 6 = -2 \Rightarrow x = +4$