Q 2611523429.     (a) Which metal in the first transition series (3d series) exhibits `+1` oxidation state most frequently and why?
(b) Which of the following cations are coloured in aqueous solutions and why?
`Sc^(3+) , V^(3+) , Ti^(4+) ,Mn^(2+)`

(At. Nos. `Sc = 21, V = 23, Ti = 22, Mn =25` )



CBSE-12th 2013

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