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Engineering Chemistry
Engineering Chemistry Interview
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Q.1
Which of the following act as a catalyst in the preparation of PVC?
a) Lewis acid
b) Benzoyl peroxide
c) Potassium amide
d) Grignard reagent
Q.2
Select the incorrect statement from the following option.
a) PVC is colourless, odourless and non-inflammable
b) PVC has poor oil resistance and resistance to weathering
c) PVC is used for making bottles for consumable liquids
d) PVC has superior chemical resistance but is soluble in ethyl chloride
Q.3
The C-Cl dipole makes PVC a polymeric polar molecule.
a) True
b) False
Q.4
Plasticized PVC is not used for making ____________
a) Baby-pants
b) Bathroom curtaining
c) Pipes for drainage
d) Garden hose
Q.5
Which of the following is also known as lucite?
a) Teflon
b) Polyvinyl acetate
c) Polystyrene
d) Perspex
Q.6
Which of the following is used for making chewing gums?
a) Perspex
b) Polyvinyl acetate
c) Teflon
d) Polystyrene
Q.7
Which of the following statement is incorrect about the Teflon?
a) It has high density of the order 2.1 to 2.3 gm/cm3
b) It has excellent electrical insulation properties
c) It has high coefficient of friction
d) It is dense and chemically inert
Q.8
Which of the following is an application of Teflon?
a) Coatings of frying pans
b) Combs and brush handles
c) Audio cassettes
d) Optical fibres
Q.9
Polystyrene is prepared by ___________ polymerisation of styrene.
a) Condensation
b) Free radical
c) Anionic
d) Cationic
Q.10
The softening temperature of polystyrene is ____________
a) 10-20 0C
b) 30-50 0C
c) 80-100 0C
d) 120-150 0C
Q.11
Due to the chain stiffening effect of a benzene ring, polystyrene is hard but brittle.
a) True
b) False
Q.12
Which of the following is an application of polystyrene?
a) Insulators for motors
b) Dome-shaped covers for solar collectors
c) Laminates for printed circuitry
d) Containers for talcum powder
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