Polymer Technology
Acrilan fibres used for making cloth, carpet & blankets, which is a hard, horny & high melting polymeric material is nothing but

Saturated polyester
Polyamide
Alkyd resin
Polyacrylonitrile

ANSWER DOWNLOAD EXAMIANS APP

Polymer Technology
Synthetic rubber

Is brittle at low temperature
Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases
Is softer at higher temperature
Deforms, if stretched to double of its original dimension

ANSWER DOWNLOAD EXAMIANS APP