Polymer Technology
Cation exchange resins (0.3 to 1 mm size) used in water treatment is prepared from __________ resins.

Epoxy
Melamine formaldehyde
Phenol formaldehyde
Urea formaldehyde

ANSWER DOWNLOAD EXAMIANS APP

Polymer Technology
Polyvinyl chloride (PVC)

Softening temperature is 200°C
Uses either emulsion or suspension polymerisation methods
Is produced by polycondensation reaction
Can be made thermosetting by adding a plasticiser

ANSWER DOWNLOAD EXAMIANS APP