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

Monomer of polythene is

• ethylene

• propylene

• vinyl chloride

• None of the above

317.

Nylon obtained by the condensation of adipic acid with hexamethylene diamine

• nylon 6, 6

• nylon 7, 6

• nylon 6, 5

• nylon 9, 7

Polymerisation in which two or more chemically different monomers take part, is called

• addition polymerisation

• co-polymerisation

• chain polymerisation

• homo polymerisation

Strach is the polymer of

• glucose

• fructose

• both (a) and (b)

• None of these

Polythene is an addition polymer of

• methane

• ethane

• ethylene

• acetylene