Material Science-1

According to Hume Rothery’s rules, size of atoms must not differ by more than ________

• 5%

• 15%

• 20%

• 12%

What kind of solid solution is found in a Cu-Ni crystal?

• Interstitial solid solution

• Substitutional solid solution

• Saturated Solid Solution

• Unsaturated solid solution

Which type of solid solution does this figure illustrate?

• Interstitial and Substitutional Solid Solution

• Substitutional Solid Solution

• Interstitial Solid Solution

• Ordered Solution

According to the Hume-Rothery Rules, two elements must have very similar _____ to form a solid solution.

• atomic sizes, crystal structures, electronegativities, and number of electrons

• atomic sizes, crystal structures, electronegativities, and valencies

• atomic numbers, crystal structures, electronegativities, and valencies

• atomic weights, crystal structures, electronegativities, and number of electrons

The properties of Elements X and Y are listed below. Which Hume-Rothery Rule is broken?

Atomic Radius of X: 1.46 Angstroms

Atomic Radius of Y: 1.45 Angstroms

Crystal Structure of X: Body-centered cubic

Crystal Structure of Y: Body-centered cubic

Electronegativity of X: 3.3

Electronegativity of Y: 1.2

Valency of X: 2

Valency of Y: 2

• Atomic Structure

• Atomic Structure, Crystal Structure and Valency

• Electronegativity

• Valency

The crystal structure of aluminium is

• BCC

• HCP

• SC

• FCC