81.

A condensation polymer among the following polymers is

• teflon

• polystyrene

• PVC

• decron

Consider the following statements.

1.Thermoplastic polymers are formed by condensation polymerisation.

2.Thermosetting polymers can be remoulded or reshaped.

3. Nylon-6 is also known as perlon-L.

4. Glyptal is a thermosetting plastic.

The wrong statement(s) is/are

• 1 and 3

• 2 and 4

• 1 and 2

• 3 and 4

Match List-l with List-II and select the correct answer using the codes given below:

List I	List II
A. Polyesters	1. Buna-S
B. Polyamides	2. Orlon
C. Polydienes	3. Terylene
D. Polyacrylates	4. Nylon-6

Codes:

• A  B  C  D

  1  2  3   4

• A  B  C  D

  3  4  1   2

• A  B  C  D

  4  3   2  1

• A  B  C  D

  1  3   4  2

Dacron is obtained by the condensation polymerisation of

• Dimethyl terephthalate and ethylene glycol

• Terephthalc acid and formaldehyde

• Phenol and phthalic acid

• Phenol and formaldehyde

Nylon is not a

• condensation polymer

• polyamide

• copolymer

• homopolymer

Three dimensional molecules with cross links are formed in the case of a

• thermoplastic

• thermosetting plastic

• Both (a) and (b)

• None of the above

The monomers of buna-S rubber are

• vinyl chloride and sulphur

• butadiene

• styrene and butadiene

• isoprene and butadiene

The condensation polymer among the following is

• rubber

• protein

• PVC

• polythene

In Buna-S, the symbol Bu stands for

• 1-butene

• n-butene

• 2-butene

• butadiene

Orlon has monomeric unit

• acrolein

• glycol

• Vinyl cyanide

• Isoprene