JEE Main 2023Chemistryp Block Elements (Group 15, 16, 17 & 18)HardMCQ

JEE Main 2023 — p Block Elements (Group 15, 16, 17 & 18) Question with Solution

JEE Main 2023 (25 Jan Shift 1)

Question

Reaction of thionyl chloride with white phosphorus forms a compound [A], which on hydrolysis gives [B], a dibasic acid. [A] and [B] are respectively

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Show full solutionCorrect option: B
Correct answer
BPCl3 and H3PO3

Step-by-step explanation

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

P4+8SOCl2→4PCl3[A]+4SO2+2 S2Cl2

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

PCl3+3H2O→H3PO3[B]+3HCl

 

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About this question

This is a previous-year question from JEE Main 2023, covering the p Block Elements (Group 15, 16, 17 & 18) chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.