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In which of the following pairs are both the ions coloured in aqueous solution? (At. no. : Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)

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In which of the following pairs are both the ions coloured in aqueous solution?

(At. no. : Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)

(a) Ni2+, Cu+ 

(b) Ni2+, Ti3+

(c) Sc3+, Ti3+

(d) Sc3+, Co2+.

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1 Answer

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Best answer

Correct option (b) Ni2+, Ti3+

Explanation :

Ti3+ , Ni2+ and Co2+ are coloured due to presence of unpaired electrons.

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