JEE Main 2022 · ChemistryMultiple choiceSingle correctMediumConceptual

JEE Main 26 June 2022, Shift 1, Chemistry Q71

Question 71 of 90 in this shift, Chemistry question 11 of 30, Section A.

Consider the following reaction : A + alkali

\rightarrow

B (Major Product) If B is an oxoacid of phosphorus with no P–H bond, then A is :

(1)White $\mathrm{P_4}$
(2)Red $\mathrm{P_4}$ Official answer
(3) $\mathrm{P_2O_3}$
(4) $\mathrm{H_3PO_3}$

Official answer

Option 2

NTA final key.

Chapter: The p-Block Elements
Topic: Group 15 & 16
Idea tested: Phosphorus Oxoacids

Same idea in other shifts

Asked 9× in all

8 Apr 2023, Shift 2 · Q88The ratio of sigma and $\pi$ bonds present in pyrophosphoric acid is ____________.MediumNumerical value
15 Apr 2023, Shift 1 · Q69The number of P - O - P bonds in $\mathrm{H_4P_2O_7}$ , $\mathrm{(HPO_3)_3}$ and $\mathrm{P_4O_{10}}$ are respectivelyMediumSingle correct
26 Jul 2022, Shift 2 · Q86The number of non-ionisable protons present in the product B obtained from the following reactions is ________.…MediumNumerical value
27 Jul 2022, Shift 1 · Q70Which oxoacid of phosphorous has the highest number of oxygen atoms present in its chemical formula?EasySingle correct
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
16 Mar 2021, Shift 2 · Q37The exact volumes of 1 M NaOH solution required to neutralise 50 mL of 1 M $\mathrm{H_3PO_3}$ solution and 100 mL of 2 M…MediumSingle correct
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
3 Sep 2020, Shift 1 · Q34In a molecule of pyrophosphoric acid, the number of $\mathrm{P-OH}$ , $\mathrm{P=O}$ and $\mathrm{P-O-P}$ bonds/moiety(ies) respectively…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.