question_answer

There is no S-S bond in:

A) \[{{S}_{2}}O_{4}^{2-}\]                    

B) \[{{S}_{2}}O_{5}^{2-}\]

C) \[{{S}_{2}}O_{3}^{2-}\]                    

D) \[{{S}_{2}}O_{7}^{2-}\]

Correct Answer: D

Solution :

In \[{{\operatorname{S}}_{2}}O_{7}^{2-}\] there is an S-O-S bond. Whereas S-S bond is absent as can be seen from the structures given below.