Cu(CN)_4^{2 - } is colourless as it absorbs l | vedclass

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Question

As the oxidation state of $Cu$ in the given compound is $Cu ^{+2}$, whose electronic cofiguration is $[ Ar ] 3 d ^9$.As we know that, only $d ^0$ and

Vedclass · Accepted Answer

All above are wrong

Vedclass · Answer

As the oxidation state of $Cu$ in the given compound is $Cu ^{+2}$, whose electronic cofiguration is $[ Ar ] 3 d ^9$.As we know that, only $d ^0$ and $d ^{10}$ configuration do not absorb light in visible region and rest absorb light in visible region.

$Cu(CN)_4^{2 - }$ is colourless as it absorbs light in

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