A copolymer of isobutylene and isoprene is called:

(a) butyl rubber                   (b) buna-S

(c) buna-N                          (d) thiokol

Terylene is a:

1. Polyamide                     

2. Polyester

3. Polyether                       

4. Long chain hydrocarbon

Thermosetting plastics are:

(a) cross-linked polymers

(b) don’t melt or soften on heating

(c) cross-linking is usually developed at the time of moulding where they harden reversibly

(d) all of the above

Which are true for terpolymer?

(a) Contains three monomers

(b) ABS plastic

(c) A polymer of acrylonitrile, butadiene and styrene

(d) All of the above

Nylon-6, 10 is a polymer of.
(a) hexamethylene and adipic acid
(b) hexamethylene and sebacic acid
(c) caprolactam
(d) none of the above

The abbreviation PDI refers to:
(a) name of the polymer
(b) polydispersity index of polymer
(c) application of polymer
(d) poly diagonal index

The monomer units of silicons a water repellant, acid resistant and heat resistant polymer is:

(a) Si                          (b) SiO₂

(c) R₂SiO                    (d) none of these

The monomer units of PTFE are:

1. Cl₂CH-CH₃

2. F₂C=CF₂

3. F₃C-CF₃

4. FClC=CF₂

Which of the following natural products is not a polymer ?

(a) DNA

(b) Cellulose

(c) ATP

(d) Urease

Which of the following is wrong?
1. PMMA is called plexiglass
2. PTFE is called teflon
3. SBR is called natural rubber
4. LDPE is called low density polyethylene