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.

Natural rubber has:

1. All trans-configuration
2. Alternate cis - and trans-configuration
3. Random cis - and trans-configuration
4. All cis-configuration

A biodegradable polymer that can be prepared from glycine and aminocaproic acid is:
1. Nylon 2-nylon 6
2. PHBV
3. Buna-N
4. Nylon-6,6

The example of a thermosetting polymer among the following options is:

1.
2.
3.
4.

Which is the monomer of Neoprene in the following?

1.		2.
3.	\(CH_2=CH-C\equiv H\)	4.	\(CH_2=CH-C=CH_2\)

Nylon is an example of:

1. Polysaccharide
2. Polyamide
3. Polythene
4. Polyester

Which one of the following is not a condensation polymer?

1. Melamine

2. Glyptal

3. Dacron

4. Neoprene

Polymer that contains ester linkage is: 

1. Nylon-66

2. PVC

3. Terylene

4. SER

The biodegradable polymer is:

1. Buna-S

2. Nylon-6, 6

3. Nylon 2-nylon 6

4. Nylon-6

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

1.
2.
3.
4.