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Like white phosphorus, which phosphorus also exists as P4?

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in Chemistry – Class 12 by (188k points)
Like white phosphorus, which phosphorus also exists as P4?

(a) Black phosphorus

(b) Red phosphorus

(c) Phosphine

(d) Beta-black phosphorus

I got this question during an online exam.

I want to ask this question from P-Block Elements topic in section P-Block Elements of Chemistry – Class 12

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The correct option is (b) Red phosphorus

The explanation is: Like white phosphorus, red phosphorus also exists as P4 tetrahedra but these are joined together through covalent bonds to give a polymeric structure. Because of polymeric structure, its melting point (883 K) is much higher than that of white phosphorus(317 K).

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