Polythene is a/an________________?

Related Mcqs:

1. Low density polythene as compared to high density polythene is____________________?

   A. Harder
   B. Tougher
   C. Chemically inert
   D. More flexible

2. Polypropylene compared to polythene is___________________?

   A. Harder
   B. Stronger
   C. Lighter
   D. All A., B. and C.

3. Low pressure Zeigler process of polythene manufacture____________________?

   A. Employs a pressure of 30 kgf/cm2
   B. Achieves an yield of 95-98% based on ethylene
   C. Produces very low density polythene
   D. Does not use any catalyst for polymerisation

4. Density of high density polythene is about __________ gm/c.c ?

   A. 1.18
   B. 1.05
   C. 0.95
   D. 0.99

5. Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is__________________?

   A. 7 kgf/cm2 and 70 °C
   B. 1000 kgf/cm2 and 100°C
   C. 7 kgf/cm2 and 700°C
   D. 1 kgf/cm2 (gage) and 70°C

6. Catalyst used in the production of high density polythene by low pressure Ziegler process is ____________________?

   A. Aluminium triethyl activated with TiCl4
   B. Platinum
   C. Molybdenum
   D. Nickel

7. Density of low density polythene is about ____________ gm/c.c?

   A. 0.38
   B. 0.56
   C. 0.81
   D. 0.91

8. Softening point of high density polythene is about ______________ °C?

   A. 85
   B. 135
   C. 165
   D. 205

9. _____________ polythene is most prone to stress-cracking ?

   A. High density
   B. Low density
   C. Cross-linked
   D. Linear low density

10. Polypropylene is preferred to polythene, because the former is ____________________?

    A. Non-inflammable
    B. Harder
    C. Stronger
    D. Both B. & C.