Question

Example(s) of a compound with chlorine in $+7$ oxidation state is/are :

• A. $KCl{O}_4$
• B. $C{l}_2{O}_7$
• C. $C{l}_2{O}_6$
• D. all of these

Answer 1

Answer: (A), (B)

The correct options are
A $KCl{O}_4$
B $C{l}_2{O}_7$

Examples of compound where oxidation number of chlorine are +$7$ is $KCl{O}_4$ and $C{l}_2{O}_7$.
(a) For $KCI{O}_4$,
Let the oxidation number of Cl be $x$.
Since the overall charge on the complex is $0$, the sum of oxidation states of all elements in it should be equal to $0$.
$+1+x+4(-2)=0$
or, $x=+7$
(b) For $C{l}_2{O}_7$,
Let the oxidation number of Cl be $x$.
$2x+7(-2)=0$
or, $x=+7$