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JIPMER 2017
Exam
JIPMER
Year
2017
Subject
Chemistry
Chapter
p Block Elements (Group 15, 16, 17 & 18)

JIPMER 2017 · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

In which of the following compounds, sulphur show maximum oxidation...

In which of the following compounds, sulphur show maximum oxidation number?

Options

  1. AH2SO4\mathrm{H}_2 \mathrm{SO}_4
  2. BSO3\mathrm{SO}_3
  3. CH2 S2O7\mathrm{H}_2 \mathrm{~S}_2 \mathrm{O}_7
  4. DAll have same oxidation number for sulphur

Correct answer

D. All have same oxidation number for sulphur

Step-by-step solution

All have same oxidation number for sulphate, i.e +6 . (i)Oxidation number of S is H2SO4=+2+x−8=0∴x=+6\begin{aligned} & \mathrm{H}_2 \mathrm{SO}_4=+2+x-8=0 \\ & \therefore x=+6 \end{aligned} (ii) Oxidation number of S in SO3=x−6=0∴x=+6\mathrm{SO}_3=x-6=0 \therefore x=+6 (iii) Oxidation number of S in H2S2O7=2+2x−14=0\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}∴2x=+12x=+6\begin{aligned} \therefore 2 x & =+12 \\ x & =+6\end{aligned}$[where,[where,x=OxidationnumbersulphurOxidation number sulphur(S)$ ]
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