JEE Main 2022 · ChemistryNumerical answerNumerical valueMediumCalculation

JEE Main 28 July 2022, Shift 2, Chemistry Q56

Question 56 of 90 in this shift, Chemistry question 26 of 30, Section B.

A sample of 0.125g of an organic compound when analyzed by Duma's method yields 22.78 mL of nitrogen gas collected over KOH solution at 280 K and 759 mm Hg. The percentage of nitrogen in the given organic compound is ______. (Nearest integer) Given : (a) The vapour pressure of water of 280 K is 14.2 mm Hg. (b) R = 0.082 L atm

\mathrm{K^{-1}\ mol^{-1}}

Official answer

NTA final key.

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

Same idea in other shifts

Asked 10× in all

2 Apr 2025, Shift 2 · Q64In Dumas' method for estimation of nitrogen, 0.5 gram of an organic compound gave 60 mL of nitrogen collected at 300 K temperature and 715…MediumSingle correct
3 Apr 2025, Shift 1 · Q75During estimation of nitrogen by Dumas' method of compound X (0.42 g) [structure X: piperazine, six-membered ring with two NH groups at…EasyNumerical valueHas a figure
3 Apr 2025, Shift 2 · Q64In Dumas' method for estimation of nitrogen 0.4 g of an organic compound gave 60 mL of nitrogen collected at 300 K temperature and 715 mm…MediumSingle correct
7 Apr 2025, Shift 2 · Q74In Dumas' method 292 mg of an organic compound released 50 mL of nitrogen gas ( $\mathrm{N_2}$ ) at 300 K temperature and 715 mm Hg…MediumNumerical value
24 Jun 2022, Shift 2 · Q880.2 g of an organic compound was subjected to estimation of nitrogen by Dumas method in which volume of N $_2$ evolved (at STP) was found…EasyNumerical value
27 Aug 2021, Shift 1 · Q60The number of moles of CuO, that will be utilized in Dumas method for estimating nitrogen in a sample of 57.5 g of…HardNumerical value
31 Aug 2021, Shift 2 · Q60The transformation occurring in Duma’s method is given below…EasyNumerical value
16 Mar 2021, Shift 2 · Q60In Duma's method of estimation of nitrogen, 0.1840 g of an organic compound gave 30 mL of nitrogen collected at 287 K and 758 mm of Hg…MediumNumerical 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 108 of the 174 JEE Main shifts held from 2017 to 2026.