Which allotrope of phosphorus is thermodynamically the most stable and least reactive?

AYellow phosphorus
BBlack phosphorus
CWhite phosphorus
DRed phosphorus

Answer: B

Black phosphorus has a layered polymeric structure and is the most stable form. White (yellow) phosphorus is the most reactive and red phosphorus is intermediate.

Practice p-Block Elements: Groups 15 and 16 More on Phosphorus allotropes, phosphine, halides and oxyacids of phosphorus

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