A. Low temperature thermal insulation as in refrigerator and air conditioners
B. Acoustic control and ceiling for building
C. High temperature thermal insulation in furnaces
D. Packing of delicate electronic gadgets
Related Mcqs:
- Styrene which is a monomer for the production of polystyrene, is commercially produced by the __________________?
A. Catalytic dehydrogenation of ethyl benzene
B. Dehydration of ethyl alcohol followed by hydrogenation
C. Reacting ethylene oxide with acetaldehyde
D. Fermentation of starch - Polystyrene is a light, transparent, thermoplastic material used for making __________________?
A. Toys and combs
B. Packaging bags
C. Non-sticking utensils
D. Electrical insulation - Thermocol is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through molten__________________?
A. Saturated polyester
B. Polyurethane
C. Polystyrene
D. Either B. or C. - Polystyrene is a ____________ plastic at room temperature?
A. Ductile
B. Brittle
C. Malleable
D. None of these - Orlan fibre which is used as a wool substitute is __________________?
A. An amorphous polymer
B. A natural polymeric fibre
C. Polyacrylonitrile
D. Poly-methyl-methacrylate (PMMA) - The organic acid monomer in nylon-66 is __________________?
A. Sebacic acid
B. Terephthalic acid
C. Adipic acid
D. Benzoic acid - Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is __________________?
A. Nylon-66
B. Teflon
C. Polyester
D. Bakelite - Phenol formaldehyde __________________?
A. Employs addition polymerisation
B. Employs condensation polymerisation
C. Is a monomer
D. Is an abrasive material - Nylon-66 compared to nylon-6 has __________________?
A. Lower melting point
B. More abrasion resistant properties
C. Higher hardness
D. All A., B. and C. - Most commonly used rubber vulcanisation agent is __________________?
A. Sulphur
B. Bromine
C. Platinum
D. Alumina
