Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app

JEE Main 202325 JanuaryMorning Shift

Exam: JEE Main
Year: 2023
Date: 25 January
Shift: Morning Shift
Subject: Chemistry
Chapter: p Block Elements (Group 15, 16, 17 & 18)

JEE Main 2023 · 25 January · Morning Shift · Chemistry · p Block Elements (Group 15, 16, 17 & 18)

Reaction of thionyl chloride with white phosphorus forms a compound...

Reaction of thionyl chloride with white phosphorus forms a compound

[ A ]

, which on hydrolysis gives

[ B ]

, a dibasic acid.

[ A ]

and

[ B ]

are respectively

Options

A ${P}_{4}{O}_{6}$ and ${H}_{3}{PO}_{3}$
B ${PCl}_{3}$ and ${H}_{3}{PO}_{3}$
C ${PCl}_{5}$ and ${H}_{3}{PO}_{4}$
D ${POCl}_{3}$ and ${H}_{3}{PO}_{4}$

Correct answer

B. ${PCl}_{3}$ and ${H}_{3}{PO}_{3}$

Step-by-step solution

Phosphorus trichloride is obtained by the action of thionyl chloride with white phosphorus

${P}_{4} + 8{SOCl}_{2} \to \mathop{4{PCl}_{3}}_{[ A ]} + 4{SO}_{2} + 2{S}_{2}{Cl}_{2}$

Phosphorus trichloride is a colourless oily liquid and hydrolyses in the presence of moisture give dibasic phosphorus acid.

${PCl}_{3} + 3{H}_{2}O \to \mathop{{H}_{3}{PO}_{3}}_{[ B ]} + 3HCl$

Practice p Block Elements (Group 15, 16, 17 & 18) on Quantrex Academy →

More from p Block Elements (Group 15, 16, 17 & 18)

Correct statement(s) about the compounds X , Y and Z is(are) JEE Advanced 2026 Correct statement(s) about the compounds P , Q and R is(are) JEE Advanced 2026 Find the correct statements related to group 15 hydrides. A. Reducing nature increases… JEE Main 2026 Treatment of a gas ' X ' with a freshly prepared ferrous sulphate solution gives a… JEE Main 2026 Correct statements from the following are: A. Nitrogen in oxidation states from +1 to +4… JEE Main 2026 Given below are two statements: Statement I: The covalency of oxygen is generally two but… JEE Main 2026 Given below are two statements : Statement (I) : Oxidising power of halogens decreases in… JEE Main 2026 Given below are two statements : Statement I : The increasing order of boiling point of… JEE Main 2026 Full p Block Elements (Group 15, 16, 17 & 18) list All JEE Main PYQs