JEE Main · 2023 · 24 Jan 2023 · Shift 2 · p-Block Elements

Sum of

π

-bonds present in peroxodisulphuric acid and pyrosulphuric acid is

Answer: 8

Solution

Peroxodisulphuric acid,

HO - S O_{2} - O - O - S O_{2} - OH

, carries a peroxide bridge between its two sulphur centres, and each sulphur holds two

S = O

double bonds, so this molecule has four

π

-bonds. Pyrosulphuric acid,

HO - S O_{2} - O - S O_{2} - OH

, links its two sulphur centres through a single oxygen, and again each sulphur holds two

S = O

double bonds, giving four

π

-bonds. Adding the two contributions gives eight

π

-bonds in all.

JEE Main · 2023 · 24 Jan 2023 · Shift 2 · Integer answer

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