JEE Main 2024 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 1 February 2024, Shift 1, Chemistry Q71

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

In Kjeldahl's method for estimation of nitrogen,

\mathrm{CuSO_4}

acts as :

(1)oxidising agent
(2)reducing agent
(3)catalytic agentOfficial answer
(4)hydrolysis agent

Official answer

Option 3

NTA final key.

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

Same idea in other shifts

Asked 9× in all

1 Feb 2024, Shift 2 · Q87Following Kjeldahl's method, 1g of organic compound released ammonia, that neutralised 10 mL of 2M $\mathrm{H_2SO_4}$ . The percentage of…EasyNumerical value
25 Jul 2022, Shift 1 · Q88While estimating the nitrogen present in an organic compound by Kjeldahl's method, the ammonia evolved from $0.25$ g of the compound…EasyNumerical value
24 Jun 2022, Shift 1 · Q88A 0.166 g sample of an organic compound was digested with conc. $\mathrm{H_2SO_4}$ and then distilled with NaOH. The ammonia gas evolved…MediumNumerical value
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
25 Jul 2021, Shift 2 · Q590.8 g of an organic compound was analysed by Kjeldahl's method for the estimation of nitrogen. If the percentage of nitrogen in the…MediumNumerical value
17 Mar 2021, Shift 2 · Q42Nitrogen can be estimated by Kjeldahl's method for which of the following compound ?MediumDiagram basedHas a figure
8 Jan 2020, Shift 2 · Q40Kjeldahl's method cannot be used to estimate nitrogen for which of the following compounds ?EasySingle correctHas a figure
3 Sep 2020, Shift 1 · Q45The Kjeldahl method of Nitrogen estimation fails for which of the following reaction products ? (a) [figure: a six-membered ring drawn…MediumOtherHas a figure

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.