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JEE Main202127 Aug 2021Evening ShiftChemistryp Block Elements (Group 15, 16, 17 & 18)Actual

Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K ?

Options

  1. Aα -Black phosphorus
  2. BWhite phosphorus
  3. CYellow phosphorus
  4. Dβ -Black phosphorus

Correct answer

A. α -Black phosphorus

Step-by-step solution

When red phosphorous is heated in a sealed tube at 803   K , then α -black phosphorous is formed.

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