Polymers

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.

Which one of the following polymers is prepared by condensation polymerisation?

1. Teflon
2. Natural rubber
3. Polystyrene
4. Nylon-6,6

[ NH(CH2)6NHCO(CH2)4CO ]n is a

1. homopolymer
2. copolymer
3. addition polymer
4. thermosetting polymer.

The monomer of the polymer [figure]

1. [figure]
2. CH3CH=CHCH3
3. CH3CH=CH2
4. (CH3)2C=C(CH3)2

Which one of the following is a chain growth polymer?

1. Starch
2. Nucleic acid
3. Polystyrene
4. Protein

Acrilan is a hard, horny and a high melting material. Which one of the following represents its structure?

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