The variability of oxidation state
A) is a characteristic of transition elements
B) arises out of incomplete filling of dorbitals in such a way that their oxidation states differ from each other by unity
C) differs from the variability of oxidation states of non-transition elements where the oxidation states normally differ by a unit of two

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A only

B only

C only

A, B and C

answer is D.

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Detailed Solution

Variable oxidation is a characteristic of transition elements
and this is due to the incomplete filling of d-orbitals in such a way that their oxidation states differ from each other by unity. The difference from the variability of oxidation states of non-transition elements where the oxidation states normally differ by a unit of two. But not always true.

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