Identify the correct statement(s):

1. Bakelite and urea formaldehyde resin are elastomers
2. Poly amides like nylon 6 and nylon 6,6 are the examples of fibres.
3. Polystyrene, povinyl and polythene are thermoplastic polymers
4. Thermoplastic polymers have intermolecular forces between elastomers and fibres.

Choose the correct answer from the options given below:

B, C and D only

The correct answer is 1. B, C, and D only.

Statement A is incorrect. Bakelite and urea formaldehyde resin are thermosetting polymers, not elastomers. Elastomers are polymers that can be stretched to a great extent and return to their original shape when released. Thermosetting polymers, on the other hand, are polymers that undergo a chemical reaction during curing, which makes them permanently set and unable to be reshaped.

Statement B is correct. Polyamides like nylon 6 and nylon 6,6 are examples of fibers. Fibers are polymers that have long, chain-like molecules that are aligned in a parallel fashion. This alignment gives fibers their strength and flexibility.

Statement C is correct. Polystyrene, polyvinyl chloride, and polyethylene are thermoplastic polymers. Thermoplastic polymers are polymers that can be softened and melted by heating and can be reshaped into new objects when cooled.

Statement D is correct. Thermoplastic polymers have intermolecular forces between molecules that are weaker than the intermolecular forces between molecules in elastomers and fibers. This is why thermoplastic polymers can be softened and reshaped, while elastomers and fibers are more rigid and less easily deformed.

Therefore, the correct statements are B, C, and D only.