Question

Which oxyacid of sulphur contains $S-S$ single bond ?

• A. Oleum
• B. Marshall’s acid
• C. Dithionic acid
• D. Thiosulphuric acid

Answer 1

Answer: (C)

(a) Oleum $\left(H_2{S}_2{O}_7\right)$

(b) Marshall's acid $\left(H_2{S}_2{O}_8\right)$

(c) Dithionic acid $\left(H_2{S}_2{O}_6\right)$

(d) Thiosulphuric acid $\left(H_2{S}_2{O}_3\right)$

Thus, in dithionic acid, $S-S$ single bond is present.