p-Block Elements: Mixed MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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MixedMediumQuestion 760013

Question

Which allotrope of sulphur is stable at room temperature?

A
Rhombic sulphur
Correct
B
Monoclinic sulphur
C
Plastic sulphur
D
Milky sulphur

Correct answer

Rhombic sulphur

Explanation

Rhombic sulphur (α-sulphur, S₈ puckered rings) is stable below 96°C (transition temperature). Above 96°C, monoclinic sulphur (β-sulphur) is stable. Plastic sulphur is an amorphous form obtained by pouring molten S into cold water.

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