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Question

Are white and yellow phosphorus allotropes?


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Solution

Allotropes of Phosphorus:

  • “White phosphorus is a translucent white waxy solid. It is poisonous, insoluble in water but soluble in carbon disulfide and glows in dark (chemiluminescence).”
  • White phosphorus consists of a discrete tetrahedral P4 molecule.
  • The structure of white phosphorus is given below:
  • White phosphorus becomes yellow when exposed to light.
  • Thus, for this reason, it is also called yellow phosphorus.

Hence, white phosphorus and yellow phosphorus are not allotropes.


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