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JEE Chemistry · Medium

p-Block Elements: Phosphorus allotropes MCQ

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Phosphorus allotropesMediumQuestion 760005

Question

White phosphorus is more reactive than red phosphorus because:
  1. A
    It has strained P₄ tetrahedra with weakened P−P bonds
    Correct
  2. B
    It has a polymer structure
  3. C
    It is amorphous
  4. D
    It has higher melting point

Correct answer

It has strained P₄ tetrahedra with weakened P−P bonds

Explanation

White phosphorus consists of P₄ tetrahedral units with 60° bond angles (highly strained). The strain weakens the P−P bonds, making it more reactive. Red phosphorus has a polymeric structure with less strain and is less reactive.

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