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 ? A. Ammonium alum B. Potassium alumC. Both A. & B. D. Neither A.…
Nylon-6 as compared to nylon-66 is_________________? A. Harder B. More abrasion resistant C. Having higher melting pointD. None of these
Polypropylene compared to polythene is___________________? A. Harder B. Stronger C. LighterD. All A., B. and C.
Zeigler process________________? A. Produces high density polythene B. Uses no catalyst C. Produces low density polythene D. Employs very high pressure
Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is_________________? A. ChloroethaneB. Chloroprene C. Isoprene…
Orlan fibre which is used as a wool substitute is __________________? A. An amorphous polymer B. A natural polymeric fibreC. Polyacrylonitrile D. Poly-methyl-methacrylate (PMMA)
Teflon is__________________? A. Phenol formaldehyde B. An inorganic polymerC. Polytetrafluroethylene (PTFE) D. A monomer
The main use of butadiene is____________________? A. As a plasticiser for unsaturated polyesterB. In the manufacture of synthetic rubber C. As an anti-skimming agent in paint D. None of these
In case of dry sning of polymers, the polymer solution in a volatile solvent is forced through the snerates into a warm air chamber, where the solvent evaporates leaving behind the polymer in the filament form. Dry sning is used…
Automobile steering wheels are normally made of__________________? A. Cellulose acetate B. Cellulose nitrate C. PVC D. High density polythene