Main constituent of cotton fiber is __________________?
Main constituent of cotton fiber is __________________?
A. Lignin
B. Cellulose
C. Starch
D. Gelatine
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Branched chain polymers compared to linear polymers have higher ____________________?
Branched chain polymers compared to linear polymers have higher ____________________?A. Density
B. Tensile strength
C. Melting point
D. Degree of irregularity in atomic packingPhenol formaldehyde __________________?
Phenol formaldehyde __________________?A. Employs addition polymerisation
B. Employs condensation polymerisation
C. Is a monomer
D. Is an abrasive materialThermal pyrolysis of ethylene dichloride produces ____________________?
Thermal pyrolysis of ethylene dichloride produces ____________________?A. Trichloroethylene
B. Vinyl chloride
C. Ethanol amine
D. Ethylene oxideContact lenses for eyes are made of perspex, which is nothing but
Question: Contact lenses for eyes are made of perspex, which is nothing but
[A].polymethylmethacrylate [B].
polystyrene [C].
unsaturated polyester [D].
polypropylene Answer: Option A
Explanation:
No answer description available for this question.
Neoprene is chemically known as _________________?
Neoprene is chemically known as _________________?A. Polybutadiene
B. Styrene butadiene rubber (SBR)
C. Polyurethane
D. Poly chloropreneAddition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by _______________, which decompose to give free radicals?
Addition polymerisation takes place either by a free radical mechanism or ionic mechanism depending on the reagents used. Free radical polymerisation is catalyzed by _______________, which decompose to give free radicals?A. Organic peroxides
B. Sulphuric acid
C. Hydrofluoric acid
D. None of these