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Saturday, 31 October

JEE Main 2022 · ChemistryMultiple choiceMatch the listEasyRecall

JEE Main 30 June 2022, Shift 1, Chemistry Q78

Question 78 of 90 in this shift, Chemistry question 18 of 30, Section A.

Match List - I with List - II. List - I Polymer (a) Acrilan (b) Neoprene (c) Polystyrene (d) Buna-N List - II Repeat Unit (i) −(CH2−C(Cl)=CH−CH2)n−-(\mathrm{CH_2-C(Cl)=CH-CH_2})_n- [drawn with Cl on the C that is double bonded to CH] (ii) −(CH2−CH)n−-(\mathrm{CH_2-CH})_n- [drawn with C6H5\mathrm{C_6H_5} below the CH] (iii) −(CH2−CH)n−-(\mathrm{CH_2-CH})_n- [drawn with CN below the CH] (iv) −(CH2−CH=CH−CH2−CH2−CH)n−-(\mathrm{CH_2-CH=CH-CH_2-CH_2-CH})_n- [drawn with CN above the last CH] Choose the correct match from the options given below :

The figure, in words

List-II repeat units are drawn structural formulas in brackets with subscript n; substituents Cl, C6H5, CN drawn vertically above/below the chain carbon.
  1. (1)(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
  2. (2)(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)
  3. (3)(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)Official answer
  4. (4)(a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)

Official answer

Option 3

NTA final key.

Chapter
Polymers