Question

The pair of compounds in which the metals are in their highest oxidation state is.

• A. $MnO_{2},FeCl_{3}$
• B. $MnO_{4}^{-},CrO_{2}Cl_{2}$
• C. $MnCl_{2},CrCl_{3}$
• D. $\lbrack NiCl_{4}\rbrack^{2 -},\lbrack CoCl_{4}\rbrack^{-}$

Answer 1

Answer: (B)

$MnO_{4}^{-},CrO_{2}Cl_{2}$

Answer 2

: $MnO_{4}^{-},CrO_{2}Cl_{2} \rightarrow + 7, + 6$

$MnO_{2},FeCl_{3} \rightarrow + 4, + 3$

$MnCl_{2},CrCl_{3} \rightarrow + 2, + 3$

$\lbrack NiCl_{4}\rbrack^{2 -},\lbrack CoCl_{4}\rbrack^{-} \rightarrow + 2, + 3$