JEE Advanced 2024 Paper 2 Q07 Chemistry Inorganic Chemistry p-Block Elements (Groups 15-18) Easy

JEE Advanced 2024 Paper 2 · Q07 · p-Block Elements (Groups 15-18)

The compound(s) having peroxide linkage is(are)

  1. A. $H_2S_2O_7$
  2. B. $H_2S_2O_8$
  3. C. $H_2S_2O_5$
  4. D. $H_2SO_5$
JEE Advanced multi-correct — pick every correct option, then check.
Reveal answer + step-by-step solution

Correct answer:B, D

Solution

Peroxide linkage means an $-O-O-$ bond. (A) $H_2S_2O_7$ (pyrosulfuric acid): two $SO_3$ tetrahedra share one O; no $-O-O-$. (B) $H_2S_2O_8$ (peroxydisulfuric acid, Marshall's acid): contains $-O-O-$ between the two S centres. (C) $H_2S_2O_5$ (pyrosulfurous acid): S$-$S bond, no peroxide. (D) $H_2SO_5$ (peroxomonosulfuric acid, Caro's acid): $HO-O-SO_2-OH$, has $-O-O-$. Hence (B) and (D).

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