Related Questions

Polymethyl methacrylate (PMMA) is known as
A Bakelite
B Teflon
C Perspex
D Nylon-6
Which of the following is not the commercial name of polymethyl-methacrylate (PMMA)?
A Styrofoam
B Lucite
C Perspex
D Plexiglass
Polymethyl methacrylate, which is an acrylic resin, is also called
A Thiokol
B Plexiglass or lucite
C Dacron
D Teflon
In what ratio should a 20% methyl alcohol solution be mixed with a 50% methyl alcohol solution so that the resultant solution has 40% methyl alcohol in it?
A 1 : 2
B 2 : 1
C 1 : 3
D 3 : 1
Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (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
Contact lenses for eyes are made of perspex, which is nothing but
A Polymethylmethacrylate
B Polystyrene
C Unsaturated polyester
D Polypropylene
Perspex is nothing but
A Acrylic sheet
B An elastomer
C An alloy of lead and tin
D Aluminium foil clad with bakelite
Perspex can be used as a substitute of glass. Its monomer is
A Methyl methacrylate
B DMT
C Butadiene
D Tetrafluroethylene
Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the
A Elimination of solvent drying facility
B Higher nitration temperature
C Lower solvent dilution ratio
D All of the above
Addition polymerisation takes place either by a free radical mechanism or ionic machanism depending on the reagents used. Free radical polymerisation is catelyzed by __________ , which decompose to give free radicals.
A Organic peroxides
B Sulphuric acid
C Hydroflouric acid
D None of these

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