Question

The number of $S=O$ bonds present in sulphurous acid, peroxodisulphuric acid and pyrosulphuric acid, respectively are:

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• A. $1,4\text{and}3$
• B. $2,3\text{and}4$
• C. $2,4\text{and}3$
• D. $1,4\text{and}4$

Answer 1

The correct option is D $1,4\text{and}4$

Sulphurous acid $\left(H_{2}S{O}_3\right)$
Peroxodisulphuric acid $\left(H_2{S}_2{O}_8\right)$
Pyrosulphuric acid $\left(H_2{S}_2{O}_7\right)$