Cuprous ion is colourless while cupric ion is coloured because : (Karnataka CET 2013) (a) both h...

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Cuprous ion is colourless while cupric ion is coloured because :
(Karnataka CET 2013)
(a) both have half-filled \( p \) and \( d \)-orbitals
(b) cuprous ion has incomplete \( d \)-orbital and cupric ion has a complete \( d \)-orbital
\( P \)
(c) both have unpaired electrons in the \( d \)-orbitals
W.
(d) cuprous ion has a complete \( d \)-orbital and cupric ion has an incomplete \( d \)-orbital
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