Polymer Technology - Study Mode

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[#96] Which of the following low molecular weight (< 10 4 ), soft & waxy polymer is used in chewing gum?

(A) Cellulose acetate

(B) Polyvinyl acetate

(C) Thiokol

(D) PVC

Correct Answer

(B) Polyvinyl acetate

[#97] Polypropylene is preferred to polythene, because the former is

(A) Non-inflammable

(B) Harder

(C) Stronger

(D) Both B & C

Correct Answer

(D) Both B & C

[#98] Polycaprolactum (Nylon - 6) is produced by the condensation polymerisation of caprolactum at 240-280°C in which the conversion of caprolactum is about __________ percent.

(A) 50

(B) 75

(C) 90

(D) 99

Correct Answer

(C) 90

[#99] Unbreakable crockeries are made from __________ polymers.

(A) Polystyrene

(B) Melamine

(C) Polyurathane

(D) None of the above

Correct Answer

(B) Melamine

[#100] __________ of SBR is adversely affected, if more quantity of styrene is added to butadiene during its co-polymerisation to produce SBR.

(A) Percent elongation

(B) Resilience

(C) Freezing point

(D) Strength

Correct Answer

(B) Resilience