Find the sum of the oxidation numbers of the metals in [Cu(NH3)4]SO4, K3[Fe(CN)6] and [Ni(CO)4] (NH3 and CO are neutral ligands). Give an integer.

JEE Main levelNumerical answerDifficulty 2 of 3rx023

Find the sum of the oxidation numbers of the metals in $[Cu (NH X_{3}) X_{4}] SO X_{4}$ , $K X_{3} [Fe (CN) X_{6}]$ and $[Ni (CO) X_{4}]$ (NH3 and CO are neutral ligands). Give an integer.

Numerical answer type, tolerance 0.01.

Cu in the complex cation with sulfate is

+ 2

; Fe in

[Fe (CN) X_{6}] X^{3 -}

+ 3

; Ni in

Ni (CO) X_{4}

0

. The sum is

2 + 3 + 0 = 5