Chemical Engineering - Polymer Technology

1.
Which of the following is not the commercial name of polymethylmethacrylate (PMMA) ?
Perspex
Lucite
Plexiglass
Teflon
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
Density of low density polythene is about __________ gm/c.c.
0.38
0.56
0.81
0.91
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.
In step growth polymerisation, condensation occurs in a stepwise manner with or without the elimination of smaller molecules. An example of step growth polymerisation product is
terylene
polybutadiene
PVC
polypropylene
Answer: Option
Explanation:
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4.
Gutta parcha rubber is
soft & tacky at room temperature.
an isomer of natural rubber.
a thermosetting resin.
recovered by coagulation of rubber latex.
Answer: Option
Explanation:
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5.
The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is
polyvinyl alcohol
polyvinyl acetale
polyvinyl butyral
PVC
Answer: Option
Explanation:
No answer description is available. Let's discuss.