JEE Main · 2011 · 10 Apr 2011 · Offline · p-Block Elements

Which of the following statements regarding sulphur is incorrect ?

(A)The vapour at $20 0^{\circ} C$ consists mostly of $S_{8}$ rings
(B)At $60 0^{\circ} C$ the gas mainly consists of $S_{2}$ molecules
(C)The oxidation state of sulphur is never less than +4 in its compounds✓ Correct
(D) $S_{2}$ molecule is paramagnetic.

Answer: (C)

Solution

Sulphur runs through oxidation states from

- 2

up to

+ 6

; in

H_{2} S

, for instance, it is

- 2

, so the claim that its oxidation state is never below

+ 4

is the incorrect statement. The other descriptions hold: around

20 0^{\circ} C

the vapour is largely

S_{8}

rings, near

60 0^{\circ} C

it is mostly

S_{2}

, and

S_{2}

, like

O_{2}

, is paramagnetic.

JEE Main · 2011 · 10 Apr 2011 · Offline · Single correct option

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