JEE Main 2021 · ChemistryNumerical answerNumerical valueHardMulti-step

JEE Main 17 March 2021, Shift 1, Chemistry Q59

Question 59 of 90 in this shift, Chemistry question 29 of 30, Section B.

The reaction of white phosphorus on boiling with alkali in inert atmosphere resulted in the formation of product ‘A’. The reaction of 1 mol of ‘A’ with excess of

\mathrm{AgNO_3}

in aqueous medium gives __________ mol(s) of Ag. (Round off to the Nearest Integer).

Official answer

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
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
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
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.