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Saturday, 31 October

JEE Main 2021 · ChemistryMultiple choiceMatch the listMediumRecall

JEE Main 26 February 2021, Shift 2, Chemistry Q46

Question 46 of 90 in this shift, Chemistry question 16 of 30, Section A.

Match List-I with List-II. List-I | List-II (a) [figure: benzene ring with N2+Cl−\mathrm{N_2^+Cl^-}] →Cu2Cl2\xrightarrow{\mathrm{Cu_2Cl_2}} [figure: benzene ring with Cl] + N2+\ \mathrm{N_2} | (i) Wurtz reaction (b) [figure: benzene ring with N2+Cl−\mathrm{N_2^+Cl^-}] →Cu, HCl\xrightarrow{\mathrm{Cu,\ HCl}} [figure: benzene ring with Cl] + N2+\ \mathrm{N_2} | (ii) Sandmeyer reaction (c) 2CH3CH2Cl+2Na→EtherC2H5−C2H5+2NaCl\mathrm{2CH_3CH_2Cl + 2Na}\xrightarrow{\mathrm{Ether}}\mathrm{C_2H_5-C_2H_5 + 2NaCl} | (iii) Fittig reaction (d) 2C6H5Cl+2Na→EtherC6H5−C6H5+2NaCl\mathrm{2C_6H_5Cl + 2Na}\xrightarrow{\mathrm{Ether}}\mathrm{C_6H_5-C_6H_5 + 2NaCl} | (iv) Gatterman reaction Choose the correct answer from the options given below :

The figure, in words

Items (a) and (b) show a benzene ring bearing N2+Cl- converting to a benzene ring bearing Cl, with N2 as by-product. In the printed paper the (c) line runs directly into '(iii)' of List-II.
  1. (1)(a) →\rightarrow (ii), (b) →\rightarrow (iv), (c) →\rightarrow (i), (d) →\rightarrow (iii)Official answer
  2. (2)(a) →\rightarrow (ii), (b) →\rightarrow (i), (c) →\rightarrow (iv), (d) →\rightarrow (iii)
  3. (3)(a) →\rightarrow (iii), (b) →\rightarrow (i), (c) →\rightarrow (iv), (d) →\rightarrow (ii)
  4. (4)(a) →\rightarrow (iii), (b) →\rightarrow (iv), (c) →\rightarrow (i), (d) →\rightarrow (ii)

Official answer

Option 1

NTA final key.

Same idea in other shifts

Asked 7× in all
  1. 5 Apr 2024, Shift 1 · Q88The number of halobenzenes from the following that can be prepared by Sandmeyer's reaction is ________. [figure: five monohalobenzenes I-V…EasyNumerical valueHas a figure
  2. 6 Apr 2024, Shift 2 · Q77Identify the product (A) in the following reaction. Aniline (benzene ring with NH2\mathrm{NH_2})…MediumDiagram basedHas a figure
  3. 15 Apr 2023, Shift 1 · Q75[figure: 4-nitrotoluene (benzene ring with CH3\mathrm{CH_3} at top and NO2\mathrm{NO_2} at bottom) ⟶⟶\longrightarrow\longrightarrow benzoic…HardDiagram basedHas a figure
  4. 24 Feb 2021, Shift 2 · Q47What is the correct sequence of reagents used for converting nitrobenzene into mm-dibromobenzene ? [Scheme: nitrobenzene →\rightarrow…MediumDiagram basedHas a figure
  5. 9 Jan 2020, Shift 1 · Q42The major product Z obtained in the following reaction scheme is : (drawn starting material)…MediumDiagram basedHas a figure
  6. 4 Sep 2020, Shift 2 · Q42In the following reaction sequence, [C] is : [figure: ring drawn as a hexagon with a circle inside, NH2\mathrm{NH_2} at the top and…MediumDiagram basedHas 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. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.