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Question: Answered & Verified by Expert
In which of the following compounds, sulphur show maximum oxidation number?
Chemistryp Block Elements (Group 15, 16, 17 & 18)JIPMERJIPMER 2017
Options:
  • A $\mathrm{H}_2 \mathrm{SO}_4$
  • B $\mathrm{SO}_3$
  • C $\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_7$
  • D All have same oxidation number for sulphur
Solution:
1194 Upvotes Verified Answer
The correct answer is: All have same oxidation number for sulphur
All have same oxidation number for sulphate, i.e +6 .
(i)Oxidation number of S is
$\begin{aligned}
& \mathrm{H}_2 \mathrm{SO}_4=+2+x-8=0 \\
& \therefore x=+6
\end{aligned}$
(ii) Oxidation number of S in $\mathrm{SO}_3=x-6=0$
$\therefore x=+6$
$\begin{aligned} & \text { (iii) Oxidation number of } \mathrm{S} \text { in } \mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_7 \\ & =2+2 x-14=0\end{aligned}$
$\begin{aligned} \therefore 2 x & =+12 \\ x & =+6\end{aligned}$
[where, $x=$ Oxidation number sulphur $(S)$ ]

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