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Match each polymer in Column-I with its monomer in Column-II and the correct property of the monomer in Column-III. Column-I: (I) Polystyrene, (II) Poly(vinyl chloride), (III) Natural rubber, (IV) Nylon-6 Column-II: (i) Caprolactam, (ii) PhCH=CH2, (iii) CH2=CHCl, (iv) CH2=C(CH3)-CH=CH2 Column-III: (P) Resonance stabilisation, (Q) 1,4-addition of HBr mainly at 40 deg C, (R) Addition of HCl gives gem-dichloride, (S) CO2 evolution with KMnO4/H+ Which combination is correct?

1. (III), (ii), (R)
2. (II), (i), (P)
3. (IV), (i), (P)
4. (I), (iii), (S)

Correct answer: (IV), (i), (P)

Solution

Nylon-6 is made from caprolactam (i) by ring-opening polymerisation; the lactam ring has resonance stabilisation of the amide bond (P). This matches option C: (IV),(i),(P).

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