A. Teflon
B. Bakelite
C. SBR
D. None of these
Related Mcqs:
- Melt spinning of polymers involves the forcing of polymer melt through spinnerates (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the _____________ fibres?
A. Acrylic
B. Polyester
C. Nylon 6:6
D. Polypropylene - In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer ?
A. PTFE
B. Buna-S
C. PMMA
D. Polycaprolactam - In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer ?
A. Bakelite (phenol formaldehyde)
B. Polyester
C. Polythene
D. Nylon-6 - In case of dry spinning of polymers, the polymer solution in a volatile solvent is forced through the spinnerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry spinning is used for _______________ fibres?
A. Polythene
B. PVC
C. Rayon
D. Polyvinyl acetate - Polymerisation process in which two or more monomers of chemically different nature take part is called__________________?
A. Copolymerisation
B. Addition polymerisation
C. Chain polymerisation
D. None of these - 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 - Polymerisation of poly functional monomers produces polymers having_________________?
A. Good mechanical strength
B. Low viscosity
C. Low melting point
D. None of these - Which of the following polymers does not belong to the class of Polyacrylate polymer ?
A. PMMA
B. Polyacrylonitrile
C. Poly Ethyl acrylate
D. None of these - Which of the following is not a natural polymer ?
A. Nucleic acids e.g. RNA and DNA
B. Polysaccharides
C. Polyisoprene
D. Polyurethane - Which of the following low molecular weight (<104), soft & waxy polymer is used in „chewing gum‟ ?
A. Cellulose acetate
B. Polyvinyl acetate
C. Thiokol
D. PVC
