JEE CHEMISTRY MCQ: CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

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Variable valency is exhibited by

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Correct option: C

Transitional elements

Option C (Transitional elements) is correct because transition elements exhibit variable valency due to the involvement of d-electrons in bonding.

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\mathrm{O}, \mathrm{O}^{2-}, \mathrm{F}

\mathrm{F}^{-}