Polymer Technology Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex? Ammonium alum Both A & B Neither A nor B Potassium alum Ammonium alum Both A & B Neither A nor B Potassium alum ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Low pressure Zeigler process of polythene manufacture Employs a pressure of 30 kgf/cm² Achieves an yield of 95-98% based on ethylene Does not use any catalyst for polymerisation Produces very low density polythene Employs a pressure of 30 kgf/cm² Achieves an yield of 95-98% based on ethylene Does not use any catalyst for polymerisation Produces very low density polythene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Caprolactum, a raw material for the manufacture of nylon-6, is produced from Pyridine Phenol Benzene Naphthalene Pyridine Phenol Benzene Naphthalene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Valcunisation of rubber decreases its Tackiness Tensile strength Resistance to organic solvents Working temperature range Tackiness Tensile strength Resistance to organic solvents Working temperature range ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Zeigler - Natta catalyst (AlR₃ - AlCl₃) is used in the polymerisation of Propylene Vinyl acetate Styrene Vinyl chloride Propylene Vinyl acetate Styrene Vinyl chloride ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology 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? Polythene Bakelite (phenol formaldehyde) Nylon-6 Polyester Polythene Bakelite (phenol formaldehyde) Nylon-6 Polyester ANSWER DOWNLOAD EXAMIANS APP
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