Polymer Technology Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is Ni Fe V₂O₅ Aluminium triethyl combined with titanium tetrachloride Ni Fe V₂O₅ Aluminium triethyl combined with titanium tetrachloride 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 Pickout the wrong statement. Vulcanised rubber is more elastic than natural rubber Polymers made of more than one monomer is called copolymer or mixed polymer Polymers made of only one monomer is called homopolymer The intermoleculer forces in ther-mosplastic polymers are intermediate to that of elastomers & fibres Vulcanised rubber is more elastic than natural rubber Polymers made of more than one monomer is called copolymer or mixed polymer Polymers made of only one monomer is called homopolymer The intermoleculer forces in ther-mosplastic polymers are intermediate to that of elastomers & fibres ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is Polyvinyl alcohol PVC Polyvinyl acetale Polyvinyl butyral Polyvinyl alcohol PVC Polyvinyl acetale Polyvinyl butyral ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polymers are classified into four categories namely thermosetting, thermoplastic, elastomer and fibre depending upon their Polymerisation mechanism Molecular sizes Resistance to heat Magnitude of intermolecular forces Polymerisation mechanism Molecular sizes Resistance to heat Magnitude of intermolecular forces ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Synthetic rubber Deforms, if stretched to double of its original dimension Is brittle at low temperature Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases Is softer at higher temperature Deforms, if stretched to double of its original dimension Is brittle at low temperature Is highly permeable to air & water and is readily attacked by chemicals & atmospheric gases Is softer at higher temperature ANSWER DOWNLOAD EXAMIANS APP
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