JEE Main · 2020 · Shift-ImediumPB12-020

The number of bonds between sulphur and oxygen atoms in S2O82- and the number of bonds between sulphur and sulphur…

p-Block Elements (Class 12) · Class 12 · JEE Main Previous Year Question

Question

The number of bonds between sulphur and oxygen atoms in S2O82\mathrm{S_2O_8^{2-}} and the number of bonds between sulphur and sulphur atoms in rhombic sulphur, respectively are:

Options
  1. a

    4 and 6

  2. b

    8 and 8

  3. c

    8 and 6

  4. d

    4 and 8

Correct Answerb

8 and 8

Detailed Solution

Strategy: Count the number of covalent bonds between specific atoms in the peroxodisulphate ion and the \ceS8\ce{S8} ring.

Step 1: Structure of Peroxodisulphate ion \ceS2O82\ce{S2O8^{2-}} consists of two \ceSO3\ce{SO3} groups connected via a peroxide (OO)(-O-O-) linkage: \ce(O3SOOSO3)2\ce{(O3S-O-O-SO3)^{2-}}. Each sulphur atom forms 4 bonds with oxygen (2 double bonds and 2 single bonds). Total \ceSO\ce{S-O} bonds are 2×4=82 \times 4 = 8.

Step 2: Structure of Rhombic Sulphur Rhombic sulphur exists as \ceS8\ce{S8} molecules in a puckered-ring (crown) shape. Each sulphur atom is bonded to two carbon neighbors, resulting in a total of 8 \ceSS\ce{S-S} bonds in the ring.

Answer: (Option) [b] 8 and 8\boxed{\text{Answer: (Option) [b] 8 and 8}}

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