The compound(s) having peroxide linkage is(are) (A) H 2 S 2 O 7 𝐻 2 𝑆 2 𝑂 7 (B) H 2 S 2 O 8 𝐻 2 𝑆 2 𝑂 8 (C) H 2 S 2 O 5 𝐻 2 𝑆 2 𝑂 5 (D) H 2 S O 5

 

Understanding Peroxide Linkage

A peroxide linkage refers to an oxygen-oxygen single bond (O-O), commonly found in peroxides (e.g., hydrogen peroxide, H₂O₂). To identify which sulfur-oxygen compounds contain this linkage, we analyze their structures.

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Analyzing Each Option

(A) H₂S₂O₇ (Pyrosulfuric Acid)

• Structure:

  $${\text{HO-SO}}_2{\text{-O-SO}}_2\text{-OH}$$

• Bonds:

  • Contains S-O-S (sulfate bridge) but no O-O bond.

• Conclusion: ❌ No peroxide linkage.

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(B) H₂S₂O₈ (Peroxydisulfuric Acid)

• Structure:

  $${\text{HO-SO}}_2{\text{-O-O-SO}}_2\text{-OH}$$

• Bonds:

  • Contains a peroxide linkage (O-O) between the two sulfate groups.

• Conclusion: ✅ Has a peroxide linkage.

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(C) H₂S₂O₅ (Disulfurous Acid)

• Structure:

  $${\text{HO-SO-SO}}_2\text{-OH}$$

• Bonds:

  • Contains S-S and S=O bonds but no O-O bond.

• Conclusion: ❌ No peroxide linkage.

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(D) H₂SO₅ (Peroxymonosulfuric Acid, "Caro's Acid")

• Structure:

  $${\text{HO-SO}}_2\text{-O-OH}$$

• Bonds:

  • Contains a peroxide linkage (O-O) at the terminal -OOH group.

• Conclusion: ✅ Has a peroxide linkage.

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Final Answer

The compounds with peroxide linkages are:
(B) H₂S₂O₈ and (D) H₂SO₅.

$$\boxed{{\displaystyle B,D}}$$