The oxidation number of cobalt in K [Co(CO)_4 ] is : - Vidyadip

MCQ

The oxidation number of cobalt in $\mathrm{K}\left[\mathrm{Co}(\mathrm{CO})_4\right]$ is :

✓
$−1$
B
$−3$
C
$+1$
D
$+3$

✓

Answer

Correct option: A.

$−1$

The oxidation number of colbalt in $\mathrm{K}\left[\mathrm{Co}(\mathrm{CO})_4\right]$ is :
$+1 + x + 0 \times 4 = 0$
$\therefore x = −1.$

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