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Which allotrope of phosphorus is the most stable?

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in Chemistry – Class 12 by (188k points)
Which allotrope of phosphorus is the most stable?

(a) White phosphorus

(b) Red phosphorus

(c) Black phosphorus

(d) Phosphine

The 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

1 Answer

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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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