Polymer Technology Vulcanisation of rubber does not increase its Softness Weight & strength Elasticity & water solubility Oxidation resistance Softness Weight & strength Elasticity & water solubility Oxidation resistance ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Which of the following natural bio polymers are formed as a result of polymerisation of amino-acids? Nucleic acids Cellulose Proteins Starch Nucleic acids Cellulose Proteins Starch 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 Viscosity of a polymer solution or melt Decreases with increase in molecular weight Does not vary with temperature rise Decreases with increase in temperature Increases with increase in temperature Decreases with increase in molecular weight Does not vary with temperature rise Decreases with increase in temperature Increases with increase in temperature ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Fillers such as zinc oxide and carbon black are added to the crude natural rubber before vulcanisation in order to improve its Weathering characteristics Elasticity Strength Plasticity Weathering characteristics Elasticity Strength Plasticity ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Neoprene is rendered non-inflammable, because of Its linear chain structure Its cross-linked structure The presence of chlorine atoms in its monomer The absence of chlorine atoms in its monomer Its linear chain structure Its cross-linked structure The presence of chlorine atoms in its monomer The absence of chlorine atoms in its monomer ANSWER DOWNLOAD EXAMIANS APP
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