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MolSynapse / Question bank / p-Block Elements: Groups 15 and 16 / Sulphur allotropes, SO2, sulphuric acid, oxyacids of sulphur
NEET levelSingle correct optionDifficulty 1 of 3pn147

The stable allotropic form of sulphur at room temperature is

  1. Amonoclinic sulphur
  2. Bcolloidal sulphur
  3. Crhombic sulphur
  4. Dplastic sulphur

Answer: C

Rhombic (alpha) sulphur, made of puckered S8 rings, is stable at room temperature. It changes to monoclinic sulphur above 369 K.
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