JEE Main 2022Chemistryp Block Elements (Group 15, 16, 17 & 18)MediumNumerical

JEE Main 2022p Block Elements (Group 15, 16, 17 & 18) Question with Solution

JEE Main 2022 (25 Jun Shift 2)

Question

PCl5+H2OA+HCl

A+H2OB+HCl

Find number of ionisable hydrogen in B

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Show full solutionCorrect answer: 3
Correct answer
3

Step-by-step explanation

PCl5 is a yellowish white powder and in moist air, it hydrolyses into POCl3 and finally gets converted to phosphoric acid.

PCl5+H2OPOCl3+2HCl

POCl3+3H2OH3PO4+3HCl

Phosphoric acid has 3 ionisable hydrogen atoms.

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About this question

This is a previous-year question from JEE Main 2022, 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.