Polymers

Which one of the following is an example of thermosetting polymer?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Nylon is an example of

1. polyamide
2. polythene
3. polyester
4. polysaccharide.

Which is the monomer of neoprene in the following?

1. CH2= Cl |C-CH=CH2
2. CH2=CH-C CH
3. CH2=CH-CH=CH2
4. CH2= CH3 |C-CH=CH2

Which one of the following sets forms the biodegradable polymer?

1. CH2=CH-CN and CH2=CH-CH=CH2
2. H2N-CH2-COOH and H2N-(CH2)5-COOH
3. HO-CH2-CH2-OH and [figure]
4. [figure] and CH2=CH-CH=CH2

Which one of the following is not a condensation polymer?

1. Melamine
2. Glyptal
3. Dacron
4. Neoprene

Which of the following statements is false?

1. Artificial silk is derived from cellulose.
2. Nylon-6, 6 is an example of elastomer.
3. The repeat unit in natural rubber is isoprene.
4. Both starch and cellulose are polymers of glucose.

Of the following which one is classified as polyester polymer?

1. Terylene
2. Bakelite
3. Melamine
4. Nylon-6,6

Which of the following structures represents neoprene polymer?

1. [-CH2- Cl |C=CH-CH2- ]n
2. [-CH2- Cl |CH- ]n
3. [-CH2- CN |CH- ]n
4. [- C6H5 |CH-CH2- ]n

Structures of some common polymers are given. Which one is not correctly presented?

1. Neoprene : [figure]
2. Terylene : [figure]
3. Nylon 6,6 : [figure]
4. Teflon : [figure]

Which one of the following statements is not true?

1. Buna-S is a copolymer of butadiene and styrene.
2. Natural rubber is a 1,4-polymer of isoprene.
3. In vulcanization, the formation of sulphur bridges between different chains makes rubber harder and stronger.
4. Natural rubber has the trans-configuration at every double bond.