which of the following monomers form biodegradable polymers? i) 3-hydroxybutanoic acid + 3-hydroxypentanoic acid ii) formaldehyde + phenol iii) ethylene glycol + phthalic acid iv) caprolactum

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Which of the following monomers form biodegradable polymers?

(a) 3-hydroxybutanoic acid + 3-hydroxypentanoic acid

(b) Glycine + amino caproic acid

(d) Caprolactum

\begin{matrix} Column-I & Column-II (Polymer) & (Monomer) (A) Bakelite & (p) ε -caprolactum (B) Polypropylene & (q) Ethylene glycol + Phthalic anhydride (C) Glyptal & (r) Propene (d) Nylon-6 & (s) Phenol+Formaldehyde \end{matrix}

\begin{matrix} Column-I & Column-II (Polymer) & (Monomer) (A) Bakelite & (p) ε -caprolactum (B) Polypropylene & (q) Ethylene glycol + Phthalic acid (C) Glyptal & (r) Propene (d) Nylon-6 & (s) Phenol+Formaldehyde \end{matrix}

C H_{3} - C H_{3} | C H - O H | C H - C H_{2} - C O O H

	Column I		Column II
(A)	Buna-N	(i)	Phthalic acid and ethylene glycol
(B)	Nylon-6,6	(ii)	Terephthalic acid and ethylene glycol
(C)	Dacron	(iii)	Hexamethylenediamine and adipic acid
(D)	Glyptal plastic	(iv)	Acrylonitrile and butadiene

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