The repeating units of PTFE are___________________?
The repeating units of PTFE are___________________?
A. Cl2CH-CH3
B. F2 C = CF2
C. F3 C-CF3
D. FClC = CF2
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Terylene is a/an_________________?
Terylene is a/an_________________?A. Addition polymer
B. Poly amide
C. Homopolymer
D. None of theseCommercial production of polypropylene employs _____________ polymerisation?
Commercial production of polypropylene employs _____________ polymerisation?A. Emulsion
B. Suspension
C. Solution
D. Bulk______________ fibres are made of polyamides?
______________ fibres are made of polyamides?A. Dacron
B. Nylon
C. Rayon
D. OrionPolyurethane cannot be used for making____________________?
Polyurethane cannot be used for making____________________?A. Mattresses & foam
B. Coating material
C. Adhesives
D. BottlesFlexible foam (for mattresses) are usually made of _________________?
Flexible foam (for mattresses) are usually made of _________________?A. PVC
B. Silicone rubber
C. Polyurethanes
D. PolyamidesPolystyrene is a ____________ plastic at room temperature?
Polystyrene is a ____________ plastic at room temperature?A. Ductile
B. Brittle
C. Malleable
D. None of these