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NEET2020Chemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Which of the following oxoacid of sulphur has – O – O – linkage?

Options

  1. AH 2 SO 4 , sulphuric acid
  2. BH 2 S 2 O 8 , peroxydisulphuric acid
  3. CH 2 S 2 O 7 , pyrosulphuric acid
  4. DH 2 SO 3 , sulphurous acid

Correct answer

B. H 2 S 2 O 8 , peroxydisulphuric acid

Step-by-step solution

Peroxydisulphuric acid is an inorganic compound with a chemical formula H 2 S 2 O 8 . Also called Marshall's acid after its inventor, Professor Hugh Marshall, it is a peroxydisulphuric acid. In structural terms, it can be written HO 3 SOOSO 3 H . It contains sulfur in its + 6 oxidation state and a peroxide group.

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