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STD 12 - p -Block elements - ll — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - p -Block elements - ll4 Marks
MCQ
Assertion : White phosphorus is more reactive than red phosphorus.

Reason : Red phosphorus consists of $P_4$ tetrahedral units linked to one another to form linear chains.

  • A
    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  • ✓
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  • C
    If the Assertion is correct but Reason is incorrect.
  • D
    If both the Assertion and Reason are incorrect.
✓

Answer

Correct option: B.
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
b
White phosphorus exists as $P_4$ tetrahedral molecule having $P-P-P$ bond angle $60^o$. Hence the molecule is under strain and more reactive. On the other hand red phosphorus exists as $P_4$ tetrahedra which are joined together through covalent bonds giving polymeric structure.

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