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Q. The oxidation state of $Mo$ in its oxo-complex species $\left[ Mo _{2} O _{4}\left( C _{2} H _{4}\right)_{2}\left( H _{2} O \right)_{2}\right]^{2-}$ is

Coordination Compounds

Solution:

$2 \times a+4 \times(-2)+2 \times 0+2 \times 0=-2$
$a=+3$