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Friday, 9 October

JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 24 June 2022, Shift 1, Chemistry Q88

Question 88 of 90 in this shift, Chemistry question 28 of 30, Section B.

A 0.166 g sample of an organic compound was digested with conc. H2SO4\mathrm{H_2SO_4} and then distilled with NaOH. The ammonia gas evolved was passed through 50.0 mL of 0.5 N H2SO4\mathrm{H_2SO_4}. The used acid required 30.0 mL of 0.25 N NaOH for complete neutralization. The mass percentage of nitrogen in the organic compound is ______.

Official answer

63

NTA final key (2022 Session 1).

Chapter
Organic Chemistry: Some Basic Principles and Techniques
Topic
Stoichiometry
Idea tested
Stoichiometry of Kjeldahl Method

Same idea in other shifts

Asked 3× in all
  1. 25 Jul 2022, Shift 1 · Q88While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from 0.250.25 g of the compound…EasyNumerical value
  2. 29 Jun 2022, Shift 1 · Q88Kjeldahl's method was used for the estimation of nitrogen in an organic compound. The ammonia evolved from 0.55 g of the compound…EasyNumerical value

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 42 of the 174 JEE Main shifts held from 2017 to 2026.