Polymers Natural Synthetic Biodegradable Non Biodegradable

Which one of the following statements is not true?

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

The structure of neoprene polymer is:

1.		2.
3.		4.

Caprolactam is used for the manufacture of:

1. Nylon - 6

2. Teflon

3. Terylene

4. Nylon - 6, 6

The correct structure of Nylon-6,6 polymer is:

1.
2.
3.
4.

Incorrect statement regarding cross-linked or network polymers is:

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 same polymer chain.

The biodegradable polymer is:

1. Buna-S

2. Nylon-6, 6

3. Nylon 2-nylon 6

4. Nylon-6

The correct statement regarding Bakelite is :

1. It is a cross linked polymer.

2. It is an additional polymer.

3. It is a branched chain polymer.

4. It is a linear polymer.

Which amongst the following molecules on polymerization produces neoprene?

1.		2.
3.		4.