Why zn2+ salts are colourless while ni2+ salts are coloured
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Your answer is given below mate......
Explanation:
Cu2+ has an unpaired electron (its configuration is [Ar] 3d9), whereas Zn2+ has all paired electrons (configuration [Ar] 3d10). ... Also, the unpaired electron in the copper ion allows electron transition in the visible region to take place, so the ion is coloured.
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