Polymer Technology __________ are produced by reacting polybasic acid (e.g. phthalic anhydride) with polyhydric alcohol (e.g., glycerol). Unsaturated polyester Saturated polyester Alkyd resins Amino resins Unsaturated polyester Saturated polyester Alkyd resins Amino resins ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polystyrene is a __________ plastic at room temperature. None of these Ductile Brittle Malleable None of these Ductile Brittle Malleable ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Styrene which is a monomer for the production of polystyrene, is commercially produced by the Fermentation of starch Dehydration of ethyl alcohol followed by hydrogenation Catalytic dehydrogenation of ethyl benzene Reacting ethylene oxide with acetal-dehyde Fermentation of starch Dehydration of ethyl alcohol followed by hydrogenation Catalytic dehydrogenation of ethyl benzene Reacting ethylene oxide with acetal-dehyde ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Density of low density polythene is about __________ gm/c.c. 0.56 0.91 0.38 0.81 0.56 0.91 0.38 0.81 ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent. 1500-2000 1-1000 2000-2500 1000-1500 1500-2000 1-1000 2000-2500 1000-1500 ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of Polyesters Cross linked polystyrene Phenol formaldehyde resins Polyamides Polyesters Cross linked polystyrene Phenol formaldehyde resins Polyamides ANSWER DOWNLOAD EXAMIANS APP
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