Polymers

Regarding cross-linked or network polymers, which of the following statements is incorrect?

1. They contain covalent bonds between various linear polymer chains.
2. They are formed from bi- and tri-functional monomers.
3. Examples are bakelite and melamine.
4. They contain strong covalent bonds in their polymer chains.

Natural rubber has

1. alternate cis- and trans-configuration
2. random cis- and trans-configuration
3. all cis-configuration
4. all trans-configuration.

Which one of the following structures represents nylon 6, 6 polymer?

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

Caprolactam is used for the manufacture of

1. teflon
2. terylene
3. nylon 6, 6
4. nylon 6

Biodegradable polymer which can be produced from glycine and aminocaproic acid is

1. buna - N
2. nylon 6, 6
3. nylon 2-nylon 6
4. PHBV

Which of the following organic compounds polymerizes to form the polyester dacron?

1. Propylene and para HO-(C6H4)-OH
2. Benzoic acid and ethanol
3. Terephthalic acid and ethylene glycol
4. Benzoic acid and para HO-(C6H4)-OH

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