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51.	What is the polymer obtained from the condensation of NH2-(CH2)6-NH2 and COOH-(CH2)8-COOH?(a) Nylon-6,6(b) Nylon-6(c) Nylon-6,10(d) TeryleneThis question was addressed to me during an interview for a job.This interesting question is from Types of Polymerisation Reactions in portion Polymers of Chemistry – Class 12
Answer» Correct option is (c) Nylon-6,10 To EXPLAIN I would say: Nylons are polyamides OBTAINED from the condensation between amines and dicarboxylic acids. The have AMIDE linkages (NHCO). Hexamethylenediamine and SEBACIC ACID from the polymer nylon-6,10.

52.	What are the monomers of dacron?(a) Ethane-1,2-diol and terephthalic acid(b) Ethylene glycol and phthalic acid(c) 1,3-Butadiene and terephthalic acid(d) Ethylene glycol and 1,3-butadieneI have been asked this question during a job interview.This interesting question is from Types of Polymerisation Reactions in portion Polymers of Chemistry – Class 12
Answer» Right option is (a) Ethane-1,2-diol and terephthalic ACID To explain: Dacron or terylene is a CONDENSATION polymer FORMED by the STEP growth POLYMERISATION of ethylene glycol and terephthalic acid.

53.	The compound [-CH2-CH(C6H5)^–]n is a ________(a) homopolymer(b) co-polymer(c) condensation polymer(d) network polymerI have been asked this question in an online quiz.The above asked question is from Classification of Polymers in portion Polymers of Chemistry – Class 12
Answer» Correct choice is (a) homopolymer To explain: [-CH2-CH(C6H5)^–]n is a homopolymer with a linear STRUCTURE. It is OBTAINED from the addition polymerisation of the monomer styrene, C6H5CH=CH2.

54.	The synthesis of which of the following polymers involves the repeated loss of small molecules?(a) Polythene(b) Buna-S(c) Buna-N(d) Nylon-6,6This question was addressed to me during an internship interview.This question is from Classification of Polymers in chapter Polymers of Chemistry – Class 12
Answer» Correct answer is (d) Nylon-6,6 For explanation I would say: CONDENSATION polymers are formed by the repeated condensation reaction between two different bi-functional or tr-functional monomeric units, along with the loss of small molecules like WATER, ALCOHOL, HCl, etc. Nylon-6,6 is formed by the condensation of hexamethylene DIAMINE and adipic acid, RESULTING in loss of water molecules.