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

Options

A. `Na_(2)S_(4) O_(6) gt H_(2)S_(2)O_(7) gt Na_(2)S_(2)O_(3) gt S_(8)`
B. `H_(2)SO_(4) lt SO_(2) gt H_(2)S gt HS_(2) O_(8)`
C. `SO_(2)^(2+) gt SO_(4)^(2+) gt SO_(3)^(2+) gt HSO^(-)`
D. `H_(2)SO_(5) gt H_(2)SO_(3) gt SCI_(2) gt H_(2)S`

Answer

D

Explanation

(a) `Na_(2)overset(2.5)(S_(4)) O_(6)*, H_(2)overset(+2)(S_(2))O_(7)*, Na_(2)overset(+2)(S_(2))O_(3)*,overset(0)(S_(8))`
(b) `H_(2)overset(+6)(SO)""_(4), overset(+4)(SO_(2)), H_(2)overset(-2)(S) gt H_(2)overset(+7)(S_(2))O_(6)`
(c) `overset(+6)(SO_(2)^(2+)), SO,overset(+6)(SO_(3)^(2-)), overset(+6)(HSO_(4)^(-))`
(d) `H_(2) overset(+6)(SO_(5)),H_(2)overset(+4)(SO_(3)), overset(+2)(SC)I_(2), H_(2)overset(-2)(S)`