Question

The oxoacid of sulfur that has S-O-S bond is

• A. Pyrosulfuric acid
• B. Pyrosulfurous acid
• C. Dithionous acid
• D. Dithionic acid

Answer 1

The Correct Option is A

The question asks us to identify the oxoacid of sulfur that contains an S-O-S bond. Let's analyze each option to determine the correct answer.

1. Pyrosulfuric acid (H₂S₂O₇):

   Also known as oleum, pyrosulfuric acid is a compound containing a sulfur-sulfur (S-O-S) bond. Its structure includes two SO₃ groups linked via an oxygen atom:

   This compound indeed contains the S-O-S linkage, making it the correct answer.

2. Pyrosulfurous acid (H₂S₂O₅):

   The structure of pyrosulfurous acid theoretically involves a similar concept of two sulfur atoms, but its existence is mainly hypothetical, and it does not traditionally represent an S-O-S bond within stable compounds.

3. Dithionous acid (H₂S₂O₄):

   Also called hydrosulfurous acid, its structure does not contain the S-O-S linkage, typically depicting linkage through two reduced sulfur centers.

4. Dithionic acid (H₂S₂O₆):

   Dithionic acid contains two sulfur atoms bonded directly to an oxygen atom each, lacking an S-O-S linkage typical of pyrosulfuric acid.

After evaluating all options, Pyrosulfuric acid (H₂S₂O₇) is the only option with the S-O-S bond.