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

A
${[Fe (CN)_{6}]}^{4 -}, {[Co (CN)_{6}]}^{3 -}$
B
${[Co (CN)_{6}]}^{3 -}, Ni (CO)_{4}$
C
${TiO}_{2}, {MnO}^{2 -}$
D
${CrO}_{2} {Cl}_{2}, {MnO}_{4}^{-}$

Solution:

Cr in ${CrO}_{2} {Cl}_{2}$ and Mn in ${MnO}_{4}^{-}$ have the highest oxidation states of +6 and + 7, respectively.

The total number of electrons that an atom acquires or loses in the process of joining with another atom to create a chemical bond is known as the oxidation number, also known as the oxidation state.

Solution:

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