1.

Sc (Z = 21) is a transition element but Zn(Z = 30) is not because

Answer»

Both `SC^(3+)` and `ZN^(2+)` ions are colourless and form white compounds
In case of Sc, 3d orbitals are partially filled but in Zn these are filled
Last electron is ASSUMED to be added to 4s level in case of Zn
Both Sc and Zn do not exhibit variable oxidation states

Answer :B


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