The number of bonds present in sulphurous acid, peroxodisulphuric acid and pyrosulphuric acid, respectively are:

Question

The number of  bonds present in sulphurous acid, peroxodisulphuric acid and pyrosulphuric acid, respectively are:

Canvas Classes · Accepted Answer

Counting S=O bonds:

Sulphurous acid ():
Structure: S has 2 S–OH and 1 S=O → 1 S=O bond

Peroxodisulphuric acid ():
Structure: 
Each S has 2 S=O bonds → 2 × 2 = 4 S=O bonds

Pyrosulphuric acid ():
Structure: 
Each S has 2 S=O bonds → 2 × 2 = 4 S=O bonds

Answer: Option (2) — 1, 4 and 4

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