Question

Which of the following have been arranged in decreasing order of oxidation number of sulphur?

• A. $Na _{2} S _{4} O _{6}> H _{2} S _{2} O _{7}> Na _{2} S _{2} O _{3}> S _{8}$
• B. $H _{2} SO _{4}> SO _{2}> H _{2} S > H _{2} S _{2} O _{8}$
• C. $SO _{2}^{2+}> SO _{4}^{2-}> SO _{3}^{2-}> HSO _{4}^{-}$
• D. $H _{2} SO _{5}> H _{2} SO _{3}> SCl _{2}> H _{2} S$

Answer 1

Answer: (D)

(a) $\overset{2.5}{Na _{2} S _{4} O _{6}} ; \overset{+6}{H _{2} S _{2} O _{7}} ; \overset{+2}{Na _{2} S _{2} O _{3}} ; \overset{0}{S _{8}}$
(b) $\overset{+6}{H _{2} SO _{4}^{+6}} ; \overset{+4}{SO _{2}} ; \overset{-2}{H _{2} S} ; \overset{+6}{H _{2} S _{2} O _{8}}$
(c) $\overset{+6}{SO _{2}^{2+}} ; \overset{+6}{SO _{4}^{2-}} ; \overset{+2}{SO _{3}^{2-}} ; \overset{+6}{HSO _{4}^{-}}$
(d) $\overset{+6}{H _{2} SO _{5}} ; \overset{+4}{H _{2} SO _{3}} ; \overset{+2}{SC l _{2}} ; \overset{-2}{H _{2} S}$