Practice Pakistan's most useful MCQs for competitive exams

_______________ is a copolymer ?

• (A)  Nylon-66
• (B)  Polypropylene
• (C)  PVC
• (D)  Poly tetra fluoro ethylene

Answer

Submitted By :Ali Uppal

Plastic articles are normally produced by _____________ moulding?

• (A)  Green sand
• (B)  Injection
• (C)  Shell
• (D)  Dry sand

Answer

Submitted By :Ali Uppal

Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is_______________________?

• (A)  Ni
• (B)  V2O5
• (C)  Fe
• (D)  Aluminium triethyl combined with titanium tetrachloride

Answer

Submitted By :Ali Uppal

Polycaprolactam (Nylon – 6) is produced by the condensation polymerisation of caprolactam at 240-280°C in which the conversion of caprolactam is about ______________ percent?

• (A)  50
• (B)  75
• (C)  90
• (D)  99

Answer

Submitted By :Ali Uppal

Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2. Which of the following polymers has the maximum film elongation (of the order of 100%) ?

• (A)  Water impermeable cellophane
• (B)  Polythene
• (C)  Cellulose acetate
• (D)  Teflon

Answer

Submitted By :Ali Uppal

The physical state in which polymers exist is___________________?

• (A)  Melts & rubber like state
• (B)  Amorphous glassy state
• (C)  Partially crystalline state
• (D)  All

Answer

Submitted By :Ali Uppal

Alkyd resin is a/an___________________?

• (A)  Polyamide
• (B)  Polyester
• (C)  Polyolefin
• (D)  Addition polymer

Answer

Submitted By :Ali Uppal

Ion exchange resins are made of____________________?

• (A)  Lucite
• (B)  Sulphonated Bakelite
• (C)  Polystyrene
• (D)  Teflon

Answer

Submitted By :Ali Uppal

Bristles of tooth brushes are made of_______________?

• (A)  Nylon-6
• (B)  Nylon-66
• (C)  Polystyrene
• (D)  PVC

Answer

Submitted By :Ali Uppal

Most of the plastics are safe to be used upto a maximum temperature of ______________ °C?

• (A)  100
• (B)  150
• (C)  350
• (D)  450

Answer

Submitted By :Ali Uppal