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

JEE Main levelSingle correct optionDifficulty 2 of 3pn041

When phosphine is passed through an aqueous solution of copper(II) sulphate, the phosphorus-containing product is

A $Cu X_{3} (PO X_{4}) X_{2}$
B $Cu (H X_{2} PO X_{2}) X_{2}$
C $CuHPO X_{3}$
D $Cu X_{3} P X_{2}$

Answer: D

Phosphine precipitates metal phosphides from salt solutions:

3 CuSO X_{4} + 2 PH X_{3} Cu X_{3} P X_{2} + 3 H X_{2} SO X_{4}

. There is no change in the oxidation state of P (-3).

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