Question

The oxidation number of $S$ in $H_{2}S{O}_5$ is_____

• A. 8
• B. 6
• C. 4
• D. 2

Answer 1

Answer: (B)

6

Let X be the oxidation number of S in $H_{2}S{O}_5$. It contains a peroxide linkage.

$2(+1)+X+3(-2)+2(-1)=0$

$2+X-6-2=0$

$X=+6$.

Hence, the oxidation number of S in $H_{2}S{O}_5$ is +6.

Option B is correct.