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Question: Answered & Verified by Expert
Assertion : Red phosphorus on heating changes its colour into black.
Reason : Black phosphorus contains $\mathrm{P}_4$ units.
Chemistryp Block Elements (Group 15, 16, 17 & 18)AIIMSAIIMS 2018 (27 May)
Options:
  • A If both assertion and reason are true and reason is the correct explanation of assertion.
  • B If both assertion and reason are true but reason is not the correct explanation of assertion.
  • C If assertion is true but reason is false.
  • D If both assertion and reason are false.
Solution:
2317 Upvotes Verified Answer
The correct answer is: If assertion is true but reason is false.
Black phosphorus has graphite like network structure.

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