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? Both A & B Neither A nor B Ammonium alum Potassium alum Both A & B Neither A nor B Ammonium alum Potassium alum ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polyesters are manufactured by the polycondensation reaction of A single monomer Inorganic acid with ethylene glycol Dibasic acid with dihydric alcohol Carboxylic acid with ethylene A single monomer Inorganic acid with ethylene glycol Dibasic acid with dihydric alcohol Carboxylic acid with ethylene ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Styrene which is a monomer for the production of polystyrene, is commercially produced by the Fermentation of starch Catalytic dehydrogenation of ethyl benzene Dehydration of ethyl alcohol followed by hydrogenation Reacting ethylene oxide with acetal-dehyde Fermentation of starch Catalytic dehydrogenation of ethyl benzene Dehydration of ethyl alcohol followed by hydrogenation Reacting ethylene oxide with acetal-dehyde ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology __________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol). Alkyd resins Saturated polyester Unsaturated polyester Amino resins Alkyd resins Saturated polyester Unsaturated polyester Amino resins ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology __________ polythene is most prone to stress-cracking Linear low density Low density Cross-linked High density Linear low density Low density Cross-linked High density ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following polymers has the tendency of decomposing before melting? Nylon Polystyrene None of these PVC Nylon Polystyrene None of these PVC ANSWER DOWNLOAD EXAMIANS APP
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