The monomer of neoprene is

• 1,3-butadiene

• 2-chloro-1,3-butadiene

• 2-methyl-1,3-butadiene

• vinyl chloride

Example of a biodegradable polymer pair is

• nylon-6, 6 and terylene

• PHBV and dextron

• bakelite and PVC

• PET and polyethylene

The polymer obtained with methylene bridges by condensation polymer is

• PVC

• buna-S

• polyacrylonitrile

• bakelite

Identify the copolymer from the following

55.

Observe the following polymers.

I. PHBV

II. Nylon-2-nylon-6

III. Glyptal

IV. Bakelite

Biodegradable polymer(s) from the above is/ are

• III

• I and II

• IV 

• III and IV

Which one of the following is not used as an initiator in ionic polymerisation?

• NaNH₂

• SnCl₂

• AlCl₃

• (C₆H₅CO)₂O₂

Which of the following is an example of condensation polymers?

• Polythene

• PVC

• Orlon

• Terylene

Natural rubber is formed by polymerisation of which of the following?

• Phenol

• Isoprene

• Chloroprene

• Styrene

Which of the following is the thermosetting plastic?

• Nylon

• Bakelite

• Polythene

• Polystyrene

Natural rubber is

• butadiene

• isoprene

• neoprene

• None of the above