Question

The oxidation number of $Cl$ in $CaO{Cl}_2$ is :

• A. $-1$ and $+1$
• B. $+2$
• C. $-2$
• D. none

Answer 1

Answer: (A)

$-1$ and $+1$

In the given compound $CaOC{l}_2$, one $Cl$ is directly attached to $Ca$ and other to $O$.

$O{Cl}^{\ominus }:-2+x=-1\Rightarrow x=+1$

${Cl}^{\ominus }:-1$

Oxidation states of $Cl$ are $-1$ and $+1$.

Hence, option A is correct.