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Q.

The pair of the compounds in which both the metals are in the highest possible oxidation state is,

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a

${[Fe (CN)_{6}]}^{3 -}, {[Co (CN)_{6}]}^{3 -}$

b

TiO₂, MnO₂

c

${CrO}_{2} {Cl}_{2}, {MnO}_{4}^{-}$

d

${[Co (CN)_{6}]}^{3 -}, {MnO}_{2}$

answer is B.

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Detailed Solution

The highest 'Mn' oxidation state is +7 found in MnO₄⁻.

'Cr' exhibits its highest oxidation state of +6 in CrO₂Cl₂.

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