Polymer Technology Which of the following is the lowest cost plastic commercially available? Bakelite PVC Polythene Teflon Bakelite PVC Polythene Teflon ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its Chemical resistance All of these Flexibility Tensile strength Chemical resistance All of these Flexibility Tensile strength ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer? Polycaprolactum PTFE Buna-S PMMA Polycaprolactum PTFE Buna-S PMMA ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polypropylene is preferred to polythene, because the former is Non-inflammable Stronger Both B & C Harder Non-inflammable Stronger Both B & C Harder ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher Melting point Tensile strength Densities Hardness, rigidity & brittleness Melting point Tensile strength Densities Hardness, rigidity & brittleness ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Low pressure Zeigler process of polythene manufacture Employs a pressure of 30 kgf/cm² Does not use any catalyst for polymerisation Produces very low density polythene Achieves an yield of 95-98% based on ethylene Employs a pressure of 30 kgf/cm² Does not use any catalyst for polymerisation Produces very low density polythene Achieves an yield of 95-98% based on ethylene ANSWER DOWNLOAD EXAMIANS APP
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