Q11 / 90 · JEE Main 2022 (28 Jun Shift 2) · Chemistry

Which of the following oxoacids of sulphur contains "S" in two different oxidation states?

Correct answer
A
$H_{2} S_{2} O_{3}$
B
$H_{2} S_{2} O_{6}$
C
$H_{2} S_{2} O_{7}$
D
$H_{2} S_{2} O_{8}$

Solution

In this molecule both sulphur has different oxidation number one has -2 oxidation number and other has +6 oxidation number. Average oxidation number of sulphur will be +2.

Hence, the correct answer is option: 'A'.

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