Which allotropic form of sulfur is used in vulcanization of rubber?
Rhombic sulfur
Monoclinic sulfur
Amorphous sulfur
Plastic sulfur
Option A Rhombic sulfur is the most stable and common form of sulfur, and it is the form that is typically used in the vulcanization of rubber. During the vulcanization process, small amounts of sulfur are added to natural or synthetic rubber, and the rhombic sulfur undergoes a chemical reaction with the rubber molecules to form cross-links, which improve the rubber's strength, elasticity, and resistance .
Explanation of incorrect option
incorrect option B Monoclinic sulfur This is incorrect. Monoclinic sulfur is an unstable form of sulfur that is not commonly used in the vulcanization of rubber.
incorrect option C Amorphous sulfur This is incorrect. Amorphous sulfur is also an unstable form of sulfur that is not commonly used in the vulcanization of rubber.
incorrect option D Plastic sulfur This is incorrect. Plastic sulfur is a metastable form of sulfur that is used for certain industrial applications, such as in the production of sulfur concrete or as an agricultural fungicide. However, it is not commonly used in the vulcanization of rubber.