Solid State Test

Directions For Questions

Packing refers to the arrangement of constituent units in such a way that the forces of attraction among the constituent particles is maximum and the constituents occupy the maximum available space. In two-dimensions, there are square close packing and hexagonal close packing. In three-dimensions, however, there are hexagonal close packing, cubic close packing and body-centred cubic packing.
(i) $$hcp: AB\ AB\ AB\ AB ....$$ arrangement
Coordination no. $$= 12$$
% occupied space $$= 74$$
(ii) $$ccp : ABC \ ABC ....$$ arrangement
Coordinate no $$= 12$$
% occupied space $$= 74$$
(iii) $$bcc : 68$$% space is occupied
Coordination no. $$= 8$$.

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Solid State Tes...

Question 1

$$a = b = c$$ and $$\alpha = \beta = \gamma = 90^{\circ}$$

$$a = b \neq c$$ and $$\alpha = \beta = \gamma = 90^{\circ}$$

$$a \neq b \neq c$$ and $$\alpha = \beta = \gamma = 90^{\circ}$$

$$a = b \neq c$$ and $$\alpha = \beta = 90^{\circ}, \gamma = 120^{\circ}$$

Question 2

primitive cubic packing

body-centered cubic packing

face-centered cubic packing

hexagonal packing

Question 3

15 mL

20 mL

25 mL

30 mL

Question 4

$$25$$%

$$50$$%

$$75$$%

$$100$$%

Question 5

$$74$$%

$$70$$%

$$68$$%

$$60.4$$%

Question 6

schottky defects

frenkel defects

colour centres

frenkel as well as schottky defects

Question 7

$$\dfrac {16}{3}\pi r^{3}$$

$$\dfrac {20}{3}\pi r^{3}$$

$$\dfrac {24}{3}\pi r^{3}$$

$$\dfrac {12}{3}\pi r^{3}$$

Question 8

$$26$$%

$$74$$%

$$52.4$$%

$$80$$%

Question 9

$$\dfrac {\pi}{4}$$

$$\dfrac {\pi}{6}$$

$$\dfrac {\pi}{3}$$

$$\dfrac {\pi}{2}$$

Question 10

0.08 : 1.00

1 : 23

1 : 24

1 : 1

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