1.

{:(ul("List - I")" (polymer)",ul("List - II")" (Stucture)"),("1) Urea formaldehyde resin","a) "(-NH-(CH_(2))_(5)-CO-)_(n)),("2) Neoprene","b) "(-NH-(CH_(2))_(6)-NH-)_(n)),("3) PVC","c) "(-CH_(2)-underset(Cl)underset(|)C=CH-CH_(2)-)_(n)),("4) Nylon - 5","d) "(-CH-underset(Cl)underset(|)CH-)_(n)),(,"e) "(-NH-CO-NH-CH_(2)-)_(n)):}

Answer»

` {:(1,2,3,4),(E,d,C,B):}`
` {:(1,2,3,4),(e,c,d,b):}`
` {:(1,2,3,4),(a,c,d,b):}`
` {:(1,2,3,4),(e,c,d,a):}`

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