Long quiz

• Linear is a type of polymer that is composed of long extended chains that tend to form flexible and high-density materials.
• Cross-linked is a type of polymer that will most likely form materials that are tough and cannot be easily stretched.
• A polymer that experiences low stress when strained is described to be elastic.
• What happens when a polymer is heated and crosses its glass transition temperature? becomes rubbery
• Starch is an example of a natural polymer
• Polyester is type of condensation polymer that is produced from the reaction of an alcohol with a carboxylic acid
• Polymers that are significantly longer than they are wide are referred as fibers.
• Hair is not a biopolymer
• Strain has NO units because it is a ratio of lengths
• Polymers that can be stretched easily and then revert to back to their original dimensions are referred to as elastomers
• Thermoset is a class of polymer that best includes epoxy resins.
• Isotactic is a polymer that has all its pendelum side chains located to one side of the polymer chain
• Addition polymer contains -C-C- linkages only
• The principle reducing agent in a blast furnace is carbon monoxide CO(g)
• The process that selectively extracts a metal from its ore by dissolving it, it is called leaching.
• Converting metal sulfides to metal oxides is a process called roasting.
• The most common source for commercial production of aluminum is called bauxite.
• The Hall-Heroult process refers to the production of aluminum by electrolysis.
• Presence of bulky pendant groups would NOT favor the formation of a highly crystalline polymer.
• Quicklime(CaO) is prepared by the thermal decomposition of CaCO3.
• Ore of mercury is called cinnabar, which is a mixture of mercury sulfide and sulfur.
• Iron phase is found in the earth's crust and mantle.
• Sylvite is the major source of potassium.
• Cyclone separation divides components of a mixture based on their densities.
• Polytetrafluoroethylene (PTFE) is also known as Teflon.
• PE stands for polyethylene.
• Nylon is a type of condensation polymer called a polyamide.
• Elastomers have a low cross-link density.
• A free radical is NOT a molecule with all its electrons paired.
• Metallurgy is the technology of metals, and is concerned

  with their extraction and utilization.
• Pyrometallurgy uses heat to obtain the metal.
• Electrometallurgy employs an electrochemical step.
• Hydrometallurgy relies on the metal’s aqueous solution

  chemistry
• Na is extracted and purified in an electrolytic apparatus

  called the Downs cell.
• Iron is recovered from its ores by reduction with C in a

  blast furnace. This process produces impure pig iron.
• Flotation of the ore removes some of the iron, enriching

  the mass % of Cu.
• The Bayer process is the pretreatment of bauxite by

  boiling with NaOH.
• Al2O3 is converted to the free metal by the Hall-Heroult electrolytic process.
• The Dow process is used to isolate Mg.
• Paramagnetic and Diamagnetic