Consider the following reaction : A + alkali → B(Major Product) If B is an oxoacid of phosphorus with no P - H bond, then A is

JEE Main 202226 JuneMorning Shift

Exam: JEE Main
Year: 2022
Date: 26 June
Shift: Morning Shift
Subject: Chemistry
Chapter: p Block Elements (Group 15, 16, 17 & 18)

JEE Main 2022 · 26 June · Morning Shift · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

Consider the following reaction : A + alkali → B(Major Product) If...

Consider the following reaction :

$A + alkali \to B\left(Major Product\right)$

If $B$ is an oxoacid of phosphorus with no $P - H$ bond, then $A$ is

Options

AWhite ${P}_{4}$
BRed $P$
C ${H}_{3}{PO}_{3}$
D ${P}_{2}{O}_{3}$

Correct answer

B. Red $P$

Step-by-step solution

${P}_{4} + 3NaOH + 3{H}_{2}O \to {PH}_{3} + 3{NaH}_{2}{PO}_{2}$

$RedP + Alkali\overset{}{\to}{H}_{4}{P}_{2}{O}_{6}$

White Phosphorous react with alkali metal hydroxide to form phosphine and a salt of ${H}_{3}{PO}_{2}^{-}$ . While red phosphorous react with alkali to give oxoacid of phosphorus with no $P - H$ bonds.

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