Chemistry D and F - Block Elements Electronic Configuration of the D-Block Elements Single Correct MCQ
Published on: August 12, 2026

The variable oxidation state are exhibited by the elements of 3d-series because:

A
They contain unpaired electrons in 3d
B
4 s -electrons are readily involved in bonding
C
Energy difference between 3 d and 4 s orbitals is small
D
3d- electrons only are involved in bonding

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The correct answer is:
C

As energy difference between 3 d and 4 s is small, both these electrons are involved in bonding. Hence, the oxidation state exhibited by the elements of 3 d -series are maximum.

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