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What is the allotrope of phosphorus in which P-atom completes its octet?(a) Alpha-black phosphorus(b) Beta-black phosphorus(c) White phosphorus(d) Red phosphorusThe question was asked in an online interview.Enquiry is from P-Block Elements in chapter P-Block Elements of Chemistry – Class 12

Answer»

Right answer is (C) White phosphorus

The explanation is: White phosphorus EXISTS as P4 units. The four sp^3 hybridized phosphorus atoms LIE at the corners of a regular tetrahedron with an angle of 60 DEGREE. Each phosphorus atom is linked to three other P-atoms by covalent bonds so that each p-atom completes it octet.



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