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

NEET levelSingle correct optionDifficulty 1 of 3pn132

When white phosphorus is boiled with concentrated NaOH solution in an inert atmosphere, phosphine is obtained along with

A $Na X_{4} P X_{2} O X_{7}$
B $Na X_{3} PO X_{4}$
C $Na X_{2} HPO X_{3}$
D $NaH X_{2} PO X_{2}$

Answer: D

The disproportionation reaction is

P X_{4} + 3 NaOH + 3 H X_{2} O PH X_{3} + 3 NaH X_{2} PO X_{2}

. Phosphorus goes from 0 to

- 3

in PH3 and to

+ 1

in sodium hypophosphite.

Practice p-Block Elements: Groups 15 and 16 More on Phosphorus allotropes, phosphine, halides and oxyacids of phosphorus

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