Question

Chlorine is in +$1$ oxidation state in:

• A. HCl
• B. HClO${}_4$
• C. A & B both
• D. none of these

Answer 1

Answer: (D)

none of these

The oxidation state of chlorine in

i. $HC\stackrel{n}{l}\Rightarrow 1+n=0\Rightarrow n=-1;$ Oxidation state $=-1$

ii. $HC\stackrel{n}{l}{O}_4\Rightarrow 1+n-4\left(2\right)\Rightarrow n=7;$ Oxidation state $+7$

So, the oxidation is $-1$ and $+7$ in $HCl,HCl{O}_4$ respectively.