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Q.

The set having ions which are coloured and paramagnetic both is

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a

Cu+, Zn2+, Mn4+

b

Ni2+, Mn7+, Hg2+

c

Cu2+, Cr3+, Sc+

d

Sc3+, V5+, Ti4+

answer is C.

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The electronic configuration of Scandium should be 1s2 2s2 2p6 3s2 3p6 4s2 3d 1 .

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