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Polymers

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Question
CBSEENCH12011398
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[NH(CH2)NHCO(CH2)4CO]n

  • co-polymer

  • addition polymer

  • thermosetting polymer

  • homopolymer

Solution

A.

co-polymer

-[NH(CH)2NHCO(CH2)4CO]n- is a copolymer because polymers whose repeating structural units are derived from two or more types of monomer units are called copolymer.
space nH subscript 2 end subscript straight N space left parenthesis CH 2 right parenthesis NH subscript 2 end subscript space plus space nHOOC left parenthesis space CH subscript 2 right parenthesis subscript 4 COOH space rightwards arrow from nH subscript 2 straight O to Polymerisatiaon of space minus open square brackets NH left parenthesis CH subscript 2 right parenthesis NHCO right parenthesis left parenthesis CH subscript 2 right parenthesis subscript 4 CO close square brackets subscript straight n minus

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Question
CBSEENCH12011089
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Biodegradable polymer which can be produced from glycine and aminocapric acid is

  • nylon 2-nylon 6

  • PHBV

  • buna -N

  • nylon 6,-6

Solution

A.

nylon 2-nylon 6

Nylon -2- nylon- 6
It is an alternating polyamide of glycine (containing tow carbon atoms ) and amino caproic acid or 6 -amino hexanoic acid. 

Question
CBSEENCH12011261
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Caprolactam is used for the manufacture of 

  • nylon - 6

  • Teflon

  • terylene

  • nylon-6,6

Solution

A.

nylon - 6

Question
CBSEENCH12011040
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Natural rubber has

  • All trans-configuration

  • Alternate cis and trans configuration

  • Random cis and trans configuration

  • All cis configuration

Solution

D.

All cis configuration

The repeating unit in natural rubber has the cis-configurations with chain extensions on the same side of the ethylene double bond, which is essential for elasticity. If the configuration is trans, the polymer is hard plastic.

All cis-configuration.

Question
CBSEENCH12011137
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Nylon  is an example of 

  • Polyester

  • Polysaccharide

  • polyamide

  • polythene

Solution

C.

polyamide

The general structure of any nylon polymer is

Because of the presence of amide linkage, nylon belongs to polyamides.

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