Softening point of high density polythene is about ______________ °C?
Softening point of high density polythene is about ______________ °C?
A. 85
B. 135
C. 165
D. 205
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Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800 ?
Molecular weight of a polymer is equal to the molecular weight of the repeat unit multiplied by the degree of polymerisation. What is the molecular weight of poly vinyl chloride (PVC), if its degree of polymerisation is 800 ?A. 50000
B. 51600
C. 49200
D. 50800Rayon is superior to cotton in making gauge for wound treatment, because rayon
Question: Rayon is superior to cotton in making gauge for wound treatment, because rayon
[A].is a synthetic polymer. [B].
does not stick to the wound unlike cotton. [C].
can absorb over 90% of its own weight of water. [D].
both (b) and (c). Answer: Option B
Explanation:
No answer description available for this question.
Buna-N is also called__________________?
Buna-N is also called__________________?A. Butyl rubber
B. Nitrile rubber
C. Neoprene
D. ThiokolAll thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it cannot be used for the production of plastic_______________?
All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it cannot be used for the production of plastic_______________?A. Filaments
B. Pipes
C. Buckets
D. TubingsNylon-66 compared to nylon-6 has __________________?
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.The rate controlling step in the manufacture of silicone rubber is the_________________?
The rate controlling step in the manufacture of silicone rubber is the_________________?A. Polymer termination step
B. Condensation of siloxane to silicone
C. Initial hydrolysis of silicone monomer
D. None of these