JEE Main 2021Chemistryp Block Elements (Group 15, 16, 17 & 18)MediumMCQ

JEE Main 2021 — p Block Elements (Group 15, 16, 17 & 18) Question with Solution

JEE Main 2021 (16 Mar Shift 1)

Question

Match List-I with List-II 

  List-I   List-II
  Name of oxo acid   Oxidation state of 'P
(a) Hypophosphorous acid (i) +5
(b) Orthophosphoric acid (ii) +4
(c) Hypophosphoric acid (iii) +3
(d) Orthophosphorous acid (iv) +2
    (v) +1

Choose the correct answer from the options given below :

Choose an option

Show full solutionCorrect option: A
Correct answer
A(a)-(v), (b)-(i), (c)-(ii), (d)-(iii)

Step-by-step explanation

(a) Hypophosphorus acid : H3PO2

+13+x+-2 2=0

x=+1

(b) Orthophosphoric acid : H3PO4

+13+x+-24=0

x=+5

(c) Hypophosphoric acid : H4P2O6

+14+2x+-26=0

x=+4

(d) Orthophosphorous acid : H3PO3

+13+x+-23=0

x=+3

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 2021, 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.