why cu+2 salts are coowed while zn +2 salts are colourless
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Cu2+ (3d 9 4s 0) has one unpaired electron in d-subshell which absorbs radiation in visible region resulting in d-d transition and hence Cu2+ salts are coloured. Zn2+ (3d 10 4s 0) has completely filled d-orbitals. No radiation is absorbed for d- d transition and hence Zn2+ salts are colourless.
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Answer: Cu2+ (3d 9 4s 0) has one unpaired electron in d-subshell which absorbs radiation in visible region resulting in d-d transition and hence Cu2+ salts are coloured. ... No radiation is absorbed for d- d transition and hence Zn2+ salts are colourless.
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