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MolSynapse / Question bank / p-Block Elements: Groups 15 and 16 / Phosphorus allotropes, phosphine, halides and oxyacids of phosphorus

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3pn140

Which of the following statements about white phosphorus is/are correct?

AIt consists of discrete tetrahedral $P X_{4}$ molecules with P-P-P angle of $6 0^{\circ}$ .
BIt dissolves in carbon disulphide.
CRed phosphorus is soluble in carbon disulphide.
DIt is more reactive than red phosphorus.

Answer: A, B, D

P4 is tetrahedral with 60 degree angles, which causes ring strain, so it is highly reactive. It is nonpolar and soluble in CS2. Red phosphorus is polymeric and insoluble in CS2, so the last statement is false.

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