2023 The p-Block Elements (Group 15 to 18)Oxoacids of Sulphur Medium Question 1 of 2 in Oxoacids of Sulphur

Match List-I (Oxoacids of Sulphur) with List-II (Bonds of Sulphur):

Column I

  • A. Peroxodisulphuric acid
  • B. Sulphuric acid
  • C. Pyrosulphuric acid
  • D. Sulphurous acid

Column II

  • I. Two S-OH, Four S=O, One S-O-S
  • II. Two S-OH, One S=O
  • III. Two S-OH, Four S=O, One S-O-O-S
  • IV. Two S-OH, Two S=O

Correct answer: A → III, B → IV, C → I, D → II

Solution

Peroxodisulphuric acid has an S–O–O–S link; pyrosulphuric acid has an S–O–S link.

$H_2S_2O_8$, peroxodisulphuric acid: Two S-OH, Four S=O, One S-O-O-S $H_2SO_3$, sulphurous acid: Two S-OH, One S=O bond $H_2S_2O_7$, pyrosulphuric acid: Two S-OH, Four S=O, One S-O-S bond $H_2SO_4$, sulphuric acid: Two S-OH, Two S=O

Concept structures of sulphur oxoacids

Oxoacids of Sulphur in past papers

2 questions from this chapter have appeared across 2 exam years.