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Match list-I with List-II. List-I Polymers A. Phenol-formaldehyde resin B. Copolymer of 1,3-butadiene styrene C. Polyester of glycol and phthalic acid D. Polyester of glycol and terephthalic acid List-II Commercial names I. Glyptal II. Novolac III. Buna-S IV. Dacron Choose the correct answer from the option given below:

1. A-II, B-III, C-IV, D-I
2. A-II, B-III, C-I, D-IV
3. A-I, B-I, C-III, D-IV
4. A-III, B-II, C-IV, D-I

Correct answer: A-II, B-III, C-I, D-IV

Solution

A (phenol-formaldehyde) -> Novolac (II); B (butadiene-styrene copolymer) -> Buna-S (III); C (glycol + phthalic acid) -> Glyptal (I); D (glycol + terephthalic acid) -> Dacron (IV). So A-II, B-III, C-I, D-IV.

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