Polypropylene compared to polythene is

Low density polythene as compared to high density polythene is

A

Harder

B

Tougher

C

Chemically inert

D

More flexible

Polypropylene is preferred to polythene, because the former is

A

Non-inflammable

B

Harder

C

Stronger

D

Both B & C

Commercial production of polypropylene employs __________ polymerisation.

A

Emulsion

B

Suspension

C

Solution

D

Bulk

Polythene is industrially prepared by the polymerization of-

A

Methane

B

Styrene

C

Acetylene

D

Ethylene

This long sentence "Since it is made of chemicals any food is wrapped up in it particularly in the black polythene bag for a long time, the food item becomes contaminated” refers to

A

Contaminated food items are with chemicals

B

Food items are contaminated

C

The food item becomes contaminated as it is made of chemicals

D

Food items are full of chemicals

The monomer of polythene is

A

vinyl chloride

B

ethylene

C

ethyl alcohol

D

None of the above

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

__________ polythene is most prone to stress-cracking

A

High density

B

Low density

C

Cross-linked

D

Linear low density

Polythene is polymer of

A

Ethylene

B

Propylene

C

Acetylene

D

Aniline

The polymerisation of which often following is used in manufacturing of polythene in industry ?

A

Methane

B

Styrene

C

Acetylene

D

Ethylene

Polypropylene compared to polythene is

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