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Saturday, 31 October

JEE Main · Chemistry · The p-Block Elements

Phosphorus Oxoacids

JEE Main asked Phosphorus Oxoacids 9 times in 9 of the 108 shifts Lumi analysed, in 2020, 2021, 2022 and 2023. It belongs to Group 15 & 16, in The p-Block Elements (Chemistry). The longest wait between two years asking it was 1 year. In 2021, 2022 and 2023 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
9
in 9 shifts
Years
4 of 8
First asked
2020
last in 2023
Pattern
Comes in cycles
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2021, 2022 and 2023. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170.08’200.07’210.14’220.14’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 1 in 12 shifts · 2021: 2 in 24 shifts · 2022: 4 in 24 shifts · 2023: 2 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20240 of 18
  • 20232 of 12
  • 20224 of 24
  • 20212 of 24
  • 20201 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Single correct is the usual form. Skill tested: multi-step.

  • Base needed to neutralise phosphorus oxoacids
  • Ratio of sigma and pi bonds

Difficulty

Easy 1Medium 7Hard 1

3 of the 9 questions had a numerical answer.

Every question

All 9 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 15 Apr 2023, Shift 1 · Q69The number of P - O - P bonds in H4P2O7\mathrm{H_4P_2O_7}, (HPO3)3\mathrm{(HPO_3)_3} and P4O10\mathrm{P_4O_{10}} are respectivelyMediumSingle correct
  2. 8 Apr 2023, Shift 2 · Q88The ratio of sigma and π\pi bonds present in pyrophosphoric acid is ____________.MediumNumerical value
  3. 29 Jun 2022, Shift 1 · Q71The oxoacid of phosphorus that is easily obtained from a reaction of alkali and white phosphorus and has two P-H bonds, is :MediumSingle correct
  4. 26 Jun 2022, Shift 1 · Q71Consider the following reaction : A + alkali →\rightarrow B (Major Product) If B is an oxoacid of phosphorus with no P–H bond, then A is :MediumSingle correct
  5. 27 Jul 2022, Shift 1 · Q70Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?EasySingle correct
  6. 26 Jul 2022, Shift 2 · Q86The number of non-ionisable protons present in the product B obtained from the following reactions is ________.…MediumNumerical value
  7. 17 Mar 2021, Shift 1 · Q59The reaction of white phosphorus on boiling with alkali in inert atmosphere resulted in the formation of product ‘A’. The reaction of 1…HardNumerical value
  8. 16 Mar 2021, Shift 2 · Q37The exact volumes of 1 M NaOH solution required to neutralise 50 mL of 1 M H3PO3\mathrm{H_3PO_3} solution and 100 mL of 2 M…MediumSingle correct
  9. 3 Sep 2020, Shift 1 · Q34In a molecule of pyrophosphoric acid, the number of P−OH\mathrm{P-OH}, P=O\mathrm{P=O} and P−O−P\mathrm{P-O-P} bonds/moiety(ies) respectively…MediumSingle correct

Shifts: 3 Sep 2020, Shift 1, 16 Mar 2021, Shift 2, 17 Mar 2021, Shift 1, 26 Jun 2022, Shift 1, 29 Jun 2022, Shift 1, 26 Jul 2022, Shift 2, 27 Jul 2022, Shift 1, 8 Apr 2023, Shift 2, 15 Apr 2023, Shift 1.

Same topic

Other ideas in Group 15 & 16

Group 15 & 16 has 15 ideas JEE Main has asked; 10 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisAll repeated ideas