Question is ⇒ Polypropylene compared to polythene is, Options are ⇒ (A) harder, (B) stronger, (C) lighter, (D) all (a), (b) and (c), (E) , Leave your comments or Download question paper.

Question is ⇒ Polypropylene compared to polythene is, Options are ⇒ (A) harder, (B) stronger, (C) lighter, (D) all (a), (b) and (c), (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Polypropylene compared to polythene is
A.	harder [Wrong Answer]
B.	stronger [Wrong Answer]
C.	lighter [Wrong Answer]
D.	all (a), (b) and (c) [Correct Answer]
View Answer 1 -1 Explanation:- Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ Orion is
a copolymer.
a condensation polymer.
obtained by polymerising vinyl cyanide.
all (a), (b) and (c).

⇒ Addition polymerisation is not involved in the manufacture of
low density polythene.
poly vinyl chloride.
polystyrene.
polyhexamethylene adipamide.

⇒ __________ practically possess no elasticity.
Vulcanite or ebonite
Spandex fibre
Polysulphide rubber
Epoxy resin

⇒ Dacron is a/an
polyester
unsaturated polyester
polyamide
inorganic polymer

⇒ Thermal pyrolysis of ethylene dichloride produces
trichlorethylene
vinyl chloride
ethanol amine
ethylene oxide

⇒ Which of the following is not the commercial name of polymethylmethacrylate (PMMA) ?
Perspex
Lucite
Plexiglass
Teflon

⇒ __________ resins are produced by the condensation polymerisation of formaldehyde with urea or melamine.
Epoxy
Amino
Alkyd
Phenolic

⇒ Which of the following is not a natural fibre?
Silk
Viscose rayon
Wool
Cotton

⇒ Nylon 6 as compared to nylon 6, 6 has lower
abrasion resistance.
thermal stability.
adhesion to rubber.
hardness.

⇒ In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of
cross linked polystyrene.
phenol formaldehyde resins.
polyesters.
polyamides.

⇒ Dacron is a/an
addition polymer
condensation polymer
polyester
both (b) and (c)

⇒ Polyvinyl chloride (PVC) is
a thermosetting material.
a condensation polymerisation product.
made by employing emulsion polymerisation.
none of these.

⇒ The process involved in converting rubber into a thin sheet or coating it on fabric is called
extrusion
mastication
calendering
vulcanisation

⇒ Elastomers are
thermosetting material.
exemplified by protein derivatives.
having high flexural strength.
having very high tensile strength and heat resistance.

⇒ Bakelite is
same as polytetra flouro ethylene (PTFE).
an inorganic polymer.
same as thermoset phenol formaldehyde.
not a polymer.

⇒ Polyhexamethylene adipimide is also known as
bakelite
nylon-66
epoxy resin
silicone rubber

⇒ Which of the following polymers is used for making a non stick coating on frying pans ?
Bakelite
Teflon
Perspex
PVC

⇒ Cellulose content in bomboo fibre is about __________ percent.
10
20
50
85

⇒ Polycaprolactum is nothing but
orlon
nylon 6, 6
nylon 6
saran

⇒ Celluloid is
cellulose acetate
regenerated cellulose
cellulose nitrate
cellulose acetate butyrate

⇒ Most of the plastics are safe to be used upto a maximum temperature of __________ °C.
100
150
350
450

⇒ Pick out the wrong statement.
Linear polymers are formed from bifunctional groups only and are normally thermoplastic.
Cross-linked branched chain polymers are either elastometric or thermosetting.
Branching in case of cross-linked polymers caused by small amount of impurities in bifunctional monomer formulation reduces its solubility and increases the softening point.
Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction.

⇒ Which of the following is stretched into fibres ?
Saturated polyester
Unsaturated polyester
Isoprene
Bakelite

⇒ Plasticisers are high boiling liquids added to plastic polymers to impart toughness and flexibility at ordinary temperature. Which of the following is not a plasticiser ?
Ethylene glycol
Stearic acid estors
Tricresyl phosphate
Esters of phthalic acid

⇒ Which of the following is not an elastomer ?
Polyisoprene
Neoprene
Nitrile-butadiene
None of these

⇒ Mastication of rubber means
its softening.
a treatment to retard its deterioration due to oxidation.
improving its curing rate.
depression of its freezing point.

⇒ Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
organic peroxides
sulphuric acid
hydroflouric acid
none of these

⇒ Non sulphonated hard bakelites are not used for making
ion-exchange resins
fountain pen barrels
formica table tops
combs

⇒ Flexible foam (for mattresses) are usually made of
PVC
silicone rubber
polyurethanes
polyamides

⇒ Vulcanisation of rubber does not increase its
elasticity
plasticity
ductility
none of these