Polymers

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]

Which one of the following monomers gives the polymer neoprene on polymerization?

1. CH2=CHCl
2. CCl2=CCl2
3. [figure]
4. CF2=CF2

Monomer of [figure] is

1. 2-methylpropene
2. styrene
3. propylene
4. ethene