Fibre

Q. Which of the following polymer is an example of fibre?

1. Dacron
2. Nylon-6, 6
3. All of these
4. Silk

Q.

Which of the following polymers are used as fibre?

(a) Polytetrafluoroethane

(b) Polychloroprene

(c) Nylon

(d) Terylene

Q.

Cotton is an example of:

1. Condensation polymerization

2. Synthetic polymer

3. Natural fibre

4. Addition polymer

Q.

What are polymers?

Q.

The characteristics of fibres is:

1. It has strong intermolecular forces

2. They are heavily branched molecules

3. It has weak intermolecular forces

4. It is capable of repeatedly softening on heating and hardening on cooling

Q.

'Rayon' is

1. Artificial silk

2. Natural plastic or rubber

3. Synthetic plastic

4. Natural silk

Q.

Semi-synthetic fibres manufactured from cellulose are termed as

1. Rayon
2. Nylon
3. Dacron
4. Natural rubber

Q.

Which of the following is not a polyamide fibre?

1. Terylene

2. Silk

3. Nylon-66

4. Nylon-6

Q. Which of the following statements are incorrect?

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

Q.

Which of the following is an example of a co-polymer?

1. Polyethene

2. Buna-S

3. PAN

4. PTFE

Q. The below molecule is called?

1. polyester
2. $PVC$
3. polystyrene
4. polythene

Q.

Which of the following is a synthetic polymer?

1. Perspex

2. Cellulose

3. Protein

4. Rubber

Q. Which of the following polymer is an example of fibre?

1. Silk
2. Dacron
3. Nylon-6, 6
4. All of these

Q. Which of the following is an inert polymer used in coating, particularly in non-stick cookware?

1. Teflon
2. Cellulose
3. Bakelite
4. Orlon

Q. 39. Product obtained on polymerisation of styrene and acrylonitrile

Q. The intermolecular forces between the molecular chains of fibres are?

1. Vander Waals' forces
2. Hydrogen bonds
3. Dipole-dipole interactions
4. Cross-links

Q. The intermolecular forces between the molecular chains of fibres are?

1. Vander Waals' forces
2. Hydrogen bonds
3. Dipole-dipole interactions
4. Cross-links

Q.

Rayon is

1. Natural silk

2. Artificial silk

3. Natural plastic or rubber

4. Synthetic plastic

Q.

Define the term polymerisation.

Q. Which of the following is not a characteristic features of fibres?

1. High tensile strength
2. Amorphous structure
3. Close packing of chains
4. Strong intermolecular forces

Q.

Arrange the following polymers in the increasing order of their intermolecular forces :

(a)Nylon 6, 6 , Buna-s, polythene

(b)PVC , nylon 6, neoprene