Polymer Technology The rate controlling step in the manufacture of silicone rubber is the Initial hydrolysis of silicone monomer Condensation of siloxane to silicone Polymer termination step None of these Initial hydrolysis of silicone monomer Condensation of siloxane to silicone Polymer termination step None of these ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Addition of stabiliser during PVC manufacture is done to Improve its impact strength Prevent its thermal degradation Improve its elasticity Reduce the melt viscosity & glass transition temperature Improve its impact strength Prevent its thermal degradation Improve its elasticity Reduce the melt viscosity & glass transition temperature ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Condensation polymerisation of formaldehyde with __________ does not produce phenolic resin. Phenol Resorcinol Melamine Para-cresol Phenol Resorcinol Melamine Para-cresol ANSWER DOWNLOAD EXAMIANS APP
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? Potassium alum Ammonium alum Both A & B Neither A nor B Potassium alum Ammonium alum Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Polyvinyl alcohol is used as a Water soluble adhesive Non-sticky coating on frying pans Cation/anion exchanger Textile fibre Water soluble adhesive Non-sticky coating on frying pans Cation/anion exchanger Textile fibre ANSWER DOWNLOAD EXAMIANS APP
Polymer Technology Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres. Polyester Nylon 6:6 Polypropylene Acrylic Polyester Nylon 6:6 Polypropylene Acrylic ANSWER DOWNLOAD EXAMIANS APP
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