CHM UNIT 8

What type of forces are a result of an attraction between molecules due to a distortion in the electron cloud, which causes an uneven distribution of negative charge? -Dispersion forces -Dipole-dipole forces -Electrostatic forces -Covalent forces

-Dispersion forces

Which of the following options correctly describe condensation polymerization? Select all that apply. -The term "copolymer" is an abbreviation for condensation polymer. -When the monomers of a condensation polymer combine a small molecule is eliminated. -Nylon is an example of a condensation polymer.

-When the monomers of a condensation polymer combine a small molecule is eliminated. -Nylon is an example of a condensation polymer.

Polymers that are formed by a combination of functional groups such that a small molecule is eliminated are known as-- polymers -condensation -combination -addition -radical

-condensation

Regions of the polymer that are very ordered are called-- regions. Whereas regions of the polymer that are very disordered are called--regions. -amorphous, crystalline -crystalline, thermoplastic -thermoplastic, amorphous -crystalline, amorphous

-crystalline, amorphous

which of the following are different forms of polystyrene? Select all that apply. -expandable -crystal -plasticized -amorphous

-expandable -crystal

A compound that is added in small amounts to make a polymer more sift and pliable is called a-- -softener -plasticizer -blowing agent -thermoplasticizer

-plasticizer

A molecule made up of many repeating unites linked together is called a --, while the repeating units are called--

1. Polymer 2. Monomers

The intermolecular forces that cause polyethylene to be a solid material are-- forces

Dispersion

Five of the "big six" polymers undergo-- polymerization. -addition -condensation -living free radical -ring-opening metathesis

addition

Which of the following options correctly describe a polymer? Select all that apply. -A polymer is made up of repeating units called monomers. -The prefix poly indicates that a polymer is made up of many smaller units. -Polymers have high molecular masses. -All polymers are synthetic organic compounds.

-A polymer is made up of repeating units called monomers. -The prefix poly indicates that a polymer is made up of many smaller units. -Polymers have high molecular masses.

A phenyl group-- Select all that apply. -Has the formula -C6H5 -Has the formula -CH3 - Is a 6- carbon chain with C-C single bonds throughout. -Is composed of a 6-membered ring of carbon atoms

-Has the formula -C6H5 -Is composed of a 6-membered ring of carbon atoms

In a molecular substance, the covalent bonds between the atoms hold the individual molecule together as a unit and may be referred to as-- forces. The nonbonding forces of attraction between one individual molecule and another are called-- forces. -Intermolecular, intramolecular -Intramolecular, intermolecular

-Intramolecular, intermolecular

Which of the following structural properties are associated with LDPE? Select all that apply. -Molecules of this polymer consist of 500 monomeric units. -The polyethylene chain is branched. -The structure is highly crystalline. -The polyethylene chain is linear.

-Molecules of this polymer consist of 500 monomeric units. -The polyethylene chain is branched.

Which of the following polymers are formed through addition polymerization? Select all that apply. -PS -PVC -HDPE -PET -LDPE -PP

-PS -PVC -HDPE -LDPE -PP

Which of the following statements correctly describe the word plastic? select all that apply. -Plastics is a term that applies to only a very specific group of compounds with very unique properties. -Plastic is sometimes used a synonym for synthetic polymer. -Only organic macromolecules have plastic properties. -Plastic is both an adjective and a noun.

-Plastic is sometimes used a synonym for synthetic polymer. -Plastic is both an adjective and a noun.

Which of the following options correctly describe plasticizers? Select all that apply. -Plasticizers disrupt the regular packing of polymer molecules. -PVC commonly contains plasticizers. -Plasticizers impact stiffness in a polymer. -Plasticizers are a type of polymer.

-Plasticizers disrupt the regular packing of polymer molecules. -PVC commonly contains plasticizers.