Related Questions

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
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
Which of the following is a natural inorganic fertiliser?
A Chile salt petre
B Oilcake
C Gobar mannure
D None of these
Inorganic fertilizer means-
A chemical fertilizer
B compost fertilizer
C bio-fertilizer
D natural fertilizers
Dietary inorganic iron absorption is increased by
A Vitamin C
B Fructose
C Alcohol
D Calcium
E Hepcidin
Inorganic soils with low compressibility are represented by
A MH
B SL
C ML
D CH
Organic catalysts differ from the inorganic catalyst in the sense that the former is
A Active at cryogenic temperatures only
B Prohibitively costly
C Proteinous in nature
D Active at very high temperature only
Inorganic impurities causing water pollution is
A Fats
B Carbohydrates
C Salts of metals
D Protein
Which of the following is not a natural polymer?
A Rayon
B Starch
C Cellulose
D RNA

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