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Saturday, 31 October

JEE Main 2020 · ChemistryMultiple choiceMatch the listMediumRecall

JEE Main 6 September 2020, Shift 2, Chemistry Q32

Question 32 of 75 in this shift, Chemistry question 7 of 25.

Match the following : Test / Method — Reagent (i) Lucas Test (a) C6H5SO2Cl\mathrm{C_6H_5SO_2Cl} / aq. KOH (ii) Dumas method (b) HNO3\mathrm{HNO_3} / AgNO3\mathrm{AgNO_3} (iii) Kjeldahl's method (c) CuO/CO2\mathrm{CuO/CO_2} (iv) Hinsberg Test (d) Conc. HCl and ZnCl2\mathrm{ZnCl_2} (e) H2SO4\mathrm{H_2SO_4}
  1. (1)(i)-(b), (ii)-(d), (iii)-(e), (iv)-(a)
  2. (2)(i)-(d), (ii)-(c), (iii)-(b), (iv)-(e)
  3. (3)(i)-(b), (ii)-(a), (iii)-(c), (iv)-(d)
  4. (4)(i)-(d), (ii)-(c), (iii)-(e), (iv)-(a)Official answer

Official answer

Option 4

NTA final key (Sep 2020).

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
  1. 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
  2. 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. 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
  4. 7 Apr 2025, Shift 2 · Q74In Dumas' method 292 mg of an organic compound released 50 mL of nitrogen gas (N2\mathrm{N_2}) at 300 K temperature and 715 mm Hg…MediumNumerical value
  5. 28 Jul 2022, Shift 2 · Q56A 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…MediumNumerical value
  6. 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 N2_2 evolved (at STP) was found…EasyNumerical value
  7. 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
  8. 31 Aug 2021, Shift 2 · Q60The transformation occurring in Duma’s method is given below…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 108 of the 174 JEE Main shifts held from 2017 to 2026.