For Model Quiz

Question 1

Coordination Number for Diamond

Answer 1

4

Question 2

Crystal System for Diamond

Answer 2

FCC

Question 3

Hardness for Diamond

Answer 3

10

Question 4

Melting Point for Diamond

Answer 4

~3550C

Question 5

Atoms/unit cell for Diamond

Answer 5

4 + 8(1/8) + 6(1/2) = 8

Question 6

Isomorphs for Diamond

Answer 6

Si, Ge, Sn

Question 7

Polymorphs for Diamond

Answer 7

Graphite

Question 8

Uses for Diamond

Answer 8

Gem and cutting tools

Question 9

Others for Diamond:

Answer 9

No conduction of electricity and insoluble in
water and organic solvents

Question 10

Coordination Number for Zin Blende

Answer 10

Zn: 4, S: 4

Question 11

Crystal System for Zin Blende

Answer 11

FCC

Question 12

Hardness for Zin Blende

Answer 12

3.5 - 4

Question 13

Molecules/unit cell for Zin Blende

Answer 13

Zn: 8(1/8) + 6(1/2) = 4
S: 4

Question 14

Isomorphs for Zin Blende

Answer 14

SiC, GaAs, CdS

Question 15

Polymorphs for Zin Blende

Answer 15

Wurtzite

Question 16

Application for Zin Blende

Answer 16

Pigment for paints, plastics, and rubber, Visible and infrared

Question 17

Coordination # for Wurtzite

Answer 17

Zn: 4, S: 4

Question 18

Crystal System for Wurtzite:

Answer 18

Hexagonal

Question 19

Hardness for Wurtzite

Answer 19

3.5 - 4

Question 20

Molecules/unit cell for Wurtzite:

Answer 20

Zn: 4(1/4) + 1 = 2
S: 8(1/8) + 1 = 2

Question 21

Isomorphs for Wurtzite:

Answer 21

ZnO, SiC, AiN

Question 22

Polymorphs for Wurtzite:

Answer 22

Zinc Blende

Question 23

Coordination # for Chalcopyrite

Answer 23

S: 4, Cu: 4, Fe: 4

Question 24

Crystal Structure for Chalcopyrite

Answer 24

Tetragonal

Question 25

Hardness for Chalcopyrite

Answer 25

3.5 - 4

Question 26

Atoms/unit cell for Chalcopyrite

Answer 26

Cu: 8(1/8) + 4(1/2) + 1 = 4

Fe: 8(1/8) + 6(1/2) = 4

S2: 4`

Question 27

Uses for Chalcopyrite

Answer 27

important copper ores