Solid State Test

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Solid State Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

What are the basic particles of ice crystals?

A
anions

B
cations

C
molecules

D
atoms

Solution

Basic particle forming ice crystals are water molecules. It is a molecular crystal.
Question 2
1 / -0

Density of a unit cell is same as the

A
mass of the substance.

B
atomic number of the substance.

C
volume of the substance.

D
density of the substance.

Solution

Density of a unit cell is same as the density of the substance.
Question 3
1 / -0

The number of atoms per unit cell in a face centred cubic arrangement is:

A
12

B
8

C
4

D
6

Solution

For an fcc unit cell,

Number of atoms per unit cell = (8 × 1/8) + ( 6 × 1/2) = 4
Question 4
1 / -0

The number of atoms per unit cell in a body centred cubic arrangement is:

A
2

B
12

C
8

D
6

Solution

For a bcc unit cell, number of atoms per unit cell = (8 × 1/8) + 1 = 2
Question 5
1 / -0

If atoms are present on each of face centre, each corner and in body centre of a unit cell then, what will be the number of atoms present in that unit cell?

A
5

B
7

C
4

D
6

Solution

corners = 8 x (1/8) = 1, body centre = 1 and face centre = 6 x (1/2) = 3

Total = 1+ 1 + 3 = 5
Question 6
1 / -0

How many atoms are present in end centred cubic unit cell?

A
6 atoms

B
4 atoms

C
3 atoms

D
2 atoms

Solution

Number of atoms in an end centred cubic unit cell= 8x1/8 + 2 x ½ = 2 atoms.
Question 7
1 / -0

Potassium chloride is:

A
Covalent solid

B
Molecular solid

C
Ionic solid

D
Metallic solid

Solution

Potassium chloride consists of potassium ions and chloride ions bonded to each other by ionic bond.
Question 8
1 / -0

z for a body centred unit cell is

A
1

B
8

C
2

D
4

Solution

Since the number of atoms for a body centred cubic unit cell is 2, z = 2
Question 9
1 / -0

The crystal system of a compound with unit cell dimension, a = 0.387 nm, b = 0.387 nm, c = 0.504 nm and α = β = 90^o and γ = 120^o is

A
Orthorhombic

B
Rhombohedral

C
Hexagonal

D
Cubic

Solution

γ =120^o
Question 10
1 / -0

Which of the following is NOT true for solid crystals?

A
Solid crystals have strong intermolecular forces.

B
Solid crystals have large intermolecular distances.

C
Solid crystals have fixed positions of the constituent particles.

D
Solid crystals have definite mass and volume.

Solution

Solid crystals have short intermolecular distances. The intermolecular forces are strong in solid crystals, this indicates the shorter bonds.

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Solid State Test - 5

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Solid State Test - 5

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Question 1

anions

cations

molecules

atoms

Solution

Question 2

mass of the substance.

atomic number of the substance.

volume of the substance.

density of the substance.

Solution

Question 3

12

8

4

6

Solution

Question 4

2

12

8

6

Solution

Question 5

5

7

4

6

Solution

Question 6

6 atoms

4 atoms

3 atoms

2 atoms

Solution

Question 7

Covalent solid

Molecular solid

Ionic solid

Metallic solid

Solution

Question 8

1

8

2

4

Solution

Question 9

Orthorhombic

Rhombohedral

Hexagonal

Cubic

Solution

Question 10

Solid crystals have strong intermolecular forces.

Solid crystals have large intermolecular distances.

Solid crystals have fixed positions of the constituent particles.

Solid crystals have definite mass and volume.

Solution

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