Question 1

Which of the following best describes the bonding in metallic solids, such as copper and iron?

Accepted Answer

Atoms are held together by a sea of collectively shared electrons.

Question 2

A student is asked to classify a material that is hard, porous, brittle, and composed mainly of oxides and carbides. Which type of solid is this material most likely to be?

Accepted Answer

Ceramic

Question 3

Which equation represents the reduction of iron ore to metal in a blast furnace?

Accepted Answer

$$3\mathrm{CO} + \mathrm{Fe}_2\mathrm{O}_3 \rightarrow 2\mathrm{Fe} + 3\mathrm{CO}_2$$

Question 4

Which property is NOT typical of ionic solids?

Accepted Answer

High electrical conductivity

Question 5

Which of the following is a correct statement about polymers?

Accepted Answer

Polymers are large molecules made up of repeating monomer units.

Question 6

Which type of polymer can be reheated and reshaped multiple times without degrading?

Accepted Answer

Thermoplastic

Question 7

Which of the following is a characteristic of ferrous alloys?

Accepted Answer

They contain iron as a primary element.

Question 8

A material scientist wants to combine the strength of ceramics with the flexibility of polymers. What type of material should they create?

Accepted Answer

Composite

Question 9

Which of the following is the main structural unit in silicates?

Accepted Answer

$$[\mathrm{SiO}_4]^{4-}$$

Question 10

Which process is used to make glass from raw materials?

Accepted Answer

Heating raw materials to an elevated temperature to cause melting

Question 11

Which of the following best explains why metals are good conductors of electricity?

Accepted Answer

The presence of a sea of mobile valence electrons

Question 12

Which equation represents the formation of sodium chloride from sodium and chlorine?

Accepted Answer

$$\mathrm{Na} + \mathrm{Cl} : \rightarrow \mathrm{Na}^+ + [\mathrm{Cl} :]^-$$

Question 13

Which of the following is a limitation of ferrous alloys?

Accepted Answer

Poor corrosion resistance

Question 14

Which type of bonding is predominant in ceramics?

Accepted Answer

Ionic bonding

Question 15

Which of the following is NOT a criterion for a monomer to form a polymer?

Accepted Answer

Must be saturated hydrocarbon (alkane)

Question 16

Which type of polymerization involves the loss of a small molecule such as water or alcohol?

Accepted Answer

Condensation polymerization

Question 17

Which of the following is a real-world application of composites?

Accepted Answer

Aircraft fuselage combining polymer matrix and ceramic fibers

Question 18

Which of the following statements about crystalline and amorphous solids is correct?

Accepted Answer

Crystalline solids have a regular repeating pattern of atoms.

Question 19

Which of the following is a property of molecular solids?

Accepted Answer

Held together by weak intermolecular forces

Question 20

Which of the following is a correct classification for stainless steel?

Accepted Answer

Ferrous alloy

Modern Materials: Structure and Classification of Solids, Alloys, Polymers, Ceramics, and Composites

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