Question

Identify the correct sequence of increasing number of $\pi$ - bonds in the structure of the following molecules.
(I) $H_2{S}_2{O}_6$ (II) $H_{2}S{O}_3$ (III) $H_2{S}_2{O}_5$

• A. I, II, III
• B. II, III, I
• C. II, I, III
• D. I, III, II

Answer 1

The correct option is B II, III, I