CHEM 111 Midterms

Question 1

________are large molecules composed
of repeating structural units,

Answer 1

Polymers

Question 2

Polymers are large molecules composed
of repeating structural units, known as________

Answer 2

monomers.

Question 3

Can be melted and reformed
multiple times, examples
include polyethylene,
polypropylene, and polyvinyl
chloride (PVC).

Answer 3

Thermoplastics

Question 4

Cannot be melted and
reformed, examples include
epoxy, polyurethane, and
silicone.

Answer 4

Thermosets

Question 5

Exhibiting elastic properties,
examples include natural
rubber, polybutadiene, and
polyisoprene.

Answer 5

Elastomers

Question 6

Exhibiting elastic properties,
examples include natural
rubber, polybutadiene, and
polyisoprene.

Answer 6

fibers

Question 7

________is made from combining two or more non-homogeneous substances, that is, matrix substances and strengthening substance.

Answer 7

A composite material

Question 8

_________surrounds and binds the strengthening substance together.

Answer 8

The matrix substance

Question 9

_______are non-metallic, inorganic materials that can be crystalline, glassy, or a combination of both. They are typically hard, brittle, and resistant to heat, wear, and corrosion.

Answer 9

Ceramics

Question 10

________are made by mixing materials like clay, powders, and water, then shaping and heating them to high temperatures.

Answer 10

Ceramics

Question 11

_______are very strong but can be brittle.

Answer 11

Ceramics

Question 12

________Resistant to corrosion and chemical reactions.

Answer 12

Ceramics