JEE Advanced Chemistry question

Which pair of compounds is expected to show similar colour in aqueous medium? [IIT JEE 2005]

(A) and
(B) and Correct
(C) and
(D) and

Answer: (B)

Solution

Colour similarity between transition-metal salts depends on having a similar number of unpaired d-electrons (similar d-d transitions). In , vanadium is present as : , one unpaired electron. In , copper is present as : , which (being one electron short of a filled

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Question ID VK-159582