Which allotrope of phosphorus is the most stable?(a) White phosphorus(b) Red phosphorus(c) Black phosphorus(d) PhosphineThe question was posed to me during a job interview.My doubt stems from P-Block Elements topic in portion P-Block Elements of Chemistry – Class 12

Which allotrope of phosphorus is the most stable?(a) White phosphorus(

1.	Which allotrope of phosphorus is the most stable?(a) White phosphorus(b) Red phosphorus(c) Black phosphorus(d) PhosphineThe question was posed to me during a job interview.My doubt stems from P-Block Elements topic in portion P-Block Elements of Chemistry – Class 12
Answer» Correct option is (c) Black PHOSPHORUS The explanation is: Black phosphorus is thermodynamically, the most stable ALLOTROPE of phosphorus and does not burn in air even up to 673 K. It has a sharp MELTING point of 860 K. Like GRAPHITE, it is fairly a good conductor of electricity.

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