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Cu^(2+) ions are coloured but Zn^(2+) io...

`Cu^(2+)` ions are coloured but `Zn^(2+)` ions are colourless. Give reason.

Text Solution

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`Cu^(+)` ions `to` Presence of unpaired electrons.
OR
`d^9` Configuration
`Zn^(2+)` ions `to` absence of unpaired
`d^1`- electrons or `d^10` configuration
`Detailed Answer :
`Cu^(2+)` are coloured because of presence of unpaired electrons.
`Zn^(2+)` are colourless becasuse of absence of unpaired electrons.
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