A) s-block element
B) p-block element
C) d-block element
D) all of these
Correct Answer: C
Solution :
The general electronic configuration of d- block elements is \[(n-1){{d}^{1-10}},n{{s}^{1-2}}.\] They show variable oxidation state because d- electrons also take part in bond formation. They have degenerated orbitals. s and p -block elements in general do not show variable oxidation states.
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