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State and explain the Allotropes of Sulphur

Answers

1. Sulphur exist as two crystalline allotropic forms:
(i)Rhombic sulphur
(ii)Monoclinic sulphur

2. Sulphur exists in non-crystalline forms as:
(i)Plastic sulphur- Plastic sulphur is prepared from heating powdered sulphur to boil then pouring a thin continuous stream in a beaker with cold water. A long thin elastic yellow thread of plastic sulphur is formed .If left for long it turn to bright yellow crystalline rhombic sulphur.
(ii)Colloidal sulphur- Colloidal sulphur is formed when sodium thiosulphate (Na₂S₂O₃) is added hydrochloric acid to form a yellow precipitate

Wilfykil answered the question on February 19, 2019 at 06:24

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