JEE Main 2020Chemistryp Block Elements (Group 15, 16, 17 & 18)MediumMCQ

JEE Main 2020 — p Block Elements (Group 15, 16, 17 & 18) Question with Solution

JEE Main 2020 (08 Jan Shift 2)

Question

White phosphorus on reaction with concentrated NaOH solution in an inert atmosphere of CO2 gives phosphine and compound X.X on acidification with HCl gives compound Y. The basicity of compound Y is:

Choose an option

Show full solutionCorrect option: B
Correct answer
B1

Step-by-step explanation

P 4 +3NaOH+3 H 2 O→ 3 NaH 2 PO 2 x + PH 3

NaH 2 PO 2 +HCl→NaCl+ H 3 PO 2 Y

 

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the p Block Elements (Group 15, 16, 17 & 18) chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2020, 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.