The number of bonds between sulphur and oxygen atoms in $\mathrm{S}_{2} \mathrm{O}_{8}^{-}$ and the number of bonds between sulphur and sulphur atoms in rhombic sulphur, respectively, are:

JEE Main · 2020 · 08 Jan 2020 · Shift 1 · p-Block Elements

The number of bonds between sulphur and oxygen atoms in

S_{2} O_{8}^{-}

and the number of bonds between sulphur and sulphur atoms in rhombic sulphur, respectively, are:

(A)4 and 8
(B)4 and 6
(C)8 and 6
(D)8 and 8✓ Correct

Answer: (D)

Solution

In the peroxydisulfate ion

S_{2} O_{8}^{2 -}

each sulfur is bonded to four oxygens, counting the oxygens of the

O - O

peroxide bridge, so the ion holds eight

S - O

bonds in all. In rhombic sulfur,

S_{8}

, the eight atoms close into a puckered crown ring joined by eight

S - S

single bonds. The two counts are therefore eight and eight.

JEE Main · 2020 · 08 Jan 2020 · Shift 1 · Single correct option

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