Solid State Test

Result

Solid State Test - 75

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Weekly Quiz Competition

Question 1
1 / -0

AAA type packing in 3D has a unit cell as :

A
primitive

B
FCC

C
BCC

D
CCP
Question 2
1 / -0

The percentage of empty space in simple cubic unit cell:

A
52%

B
42%

C
48%

D
68%

Solution
Question 3
1 / -0

A metallic element has simple cubic arrangement. The number of unit cells in 100 g of this metal $$(edge\ length\ = 288\ pm,\ density\ =\ 7.2\ g\ { cm }^{ -3 })\ are\ 5.8\times { 10 }^{ 23 }$$. The total number of atoms in 100 g of the metal is:

A
$$5.8\times { 10 }^{ 24 }$$

B
$$5.8\times { 10 }^{ 23 }$$

C
$$0.58\times { 10 }^{ 23 }$$

D
$$58\times { 10 }^{ 24 }$$

Solution
Question 4
1 / -0

The packing fraction in 2-D square packing is equal to:

A
0.91

B
0.78

C
0.32

D
0.68

Solution
Question 5
1 / -0

The coordination number of tetrahedral void:

A
3

B
4

C
6

D
2
Question 6
1 / -0

If sodium metal crystallizes in body centered cubic lattice and unit cell of sodium has edge length of 4.29 $$A^0$$, then what is the radius of sodium?

A
$$1.86 A^0$$

B
$$3.22A^0$$

C
$$5.72 A^0$$

D
$$0.93 A^0$$

Solution
Question 7
1 / -0

The percentage of empty space and coordination number in the unit cell of simple cubic lattice is:

A
$$47.6,6$$

B
$$52.4,6$$

C
$$47.6,8$$

D
$$32,8$$

Solution
Question 8
1 / -0

Which of the following correctly describes the structure of $$CaF_2$$ ?

A
$$CN\quad of\quad { Ca }^{ 2+ }=\quad 8,\quad CN\quad of\quad F^-\quad =\quad 4,4\quad Ca^{ 2+ }\quad and\quad 8\quad F^-\quad per\quad unit\quad cell\quad $$

B
$$CN\quad of\quad { Ca }^{ 2+ }=\quad 4,\quad CN\quad of\quad F^-\quad =\quad 8,8\quad Ca^{ 2+ }\quad and\quad 4\quad F^-\quad per\quad unit\quad cell\quad $$

C
$$CN\quad of\quad { Ca }^{ 2+ }=\quad 4,\quad CN\quad of\quad F^-\quad =\quad 8,4\quad Ca^{ 2+ }\quad and\quad 8\quad F^-\quad per\quad unit\quad cell\quad $$

D
$$CN\quad of\quad Ca^{ 2+ }\quad =\quad 8,\quad CN\quad of\quad F^{ - }=4,8\quad Ca^{2+}\quad and\quad 4\quad F^-\quad per\quad unit\quad cell\quad $$
Question 9
1 / -0

Calcium metal crystallises in fcc lattice with edge length 556 pm. Calculate the density of metal.

A
1.5455

B
3.992

C
1.00

D
5.00

Solution
Question 10
1 / -0

Which of the following cannot be regarded as molecular solid?

A
$$SiC$$

B
$$AlN$$

C
$$Diamond$$

D
$$All\ of\ the\ above$$

Solution

Silicon carbide $$(SiC)$$, Aluminium nitride $$(AlN)$$, and diamond are examples of network atomic solids as they have three-dimensional structure.
Hence the correct option is D.