Polymer Technology

A. Greater the degree of cross-linking in the polymer, lesser is its solubility
B. Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents
C. Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent
D. High molecular weight polymers on dissolving gives solution of very low viscosity

A. 1: 3
B. 3 : 1
C. 1 : 2
D. 2 : 1

A. Treylene
B. Orlon
C. Saran
D. Dacron

A. Bakelite
B. Teflon
C. Perspex
D. Nylon-6

A. 1000 to 5000
B. 5000 to 1000
C. 20000 to 25000
D. 109 to 1011

A. Bakelite (phenol formaldehyde)
B. Polyester
C. Polythene
D. Nylon-6

A. Cation/anion exchanger
B. Water soluble adhesive
C. Textile fibre
D. Non-sticky coating on frying pans

A. Phenol
B. Naphthalene
C. Benzene
D. Pyridine

A. 25
B. 50
C. 70
D. 90

A. Poor tensile strength
B. Poorer resistance
C. Greater amount of heat build up heavy loading
D. All A., B. and C.