Q10 / 90 · JEE Main 2022 (27 Jun Shift 1) · Chemistry

Heating white phosphorus with conc. $NaOH$ solution gives mainly

A
${Na}_{3} P$ and $H_{2} O$
B
$H_{3} PO$ and $NaH$
C
$P {(OH)}_{3}$ and ${NaH}_{2} {PO}_{4}$
Correct answer
D
${PH}_{3}$ and ${NaH}_{2} {PO}_{2}$

Solution

White phosphorous dissolves in boiling NaOH solution (in a

{CO}_{2}

atmosphere) to give phosphine,

{PH}_{3}

.

$P_{4} + 3 NaOH + 3 H_{2} O \to 3 {NaH}_{2} {PO}_{2} + {PH}_{3}$

Hence, the correct answer is option: 'D'.

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