Question

Amorphous solids have _______ structure. *

1 point

Regular

Irregular

linear

Dendrit



The Coordination number in NaCl structure is ………. *

1 point

4

5

6

7

Number lattice points in a primitive cell is *

1 point

One

two

four

Depends on type of Bravais lattice

The number of Bravais lattices is __________ *

1 point

256

7

14

37

The crystal lattice has a _________ arrangement. *

1 point

One-dimensional

Two-dimensional

Three-dimensional

Four-dimensional

Lattice +…………….= crystal structure *

1 point

unit cell

primitive cell

basis

corners

The number of crystal system is __________ *

1 point

5

14

7

21

The Intercepts of a plane in crystal is given by a, b/2, 3c in a simple cubic unit cell, Miller indices are. *

1 point

(132)

(261)

(123)

(361)

A unit cell that contains lattice points only at the corners is known as _________ *

1 point

Primitive unit cell

Secondary unit cell

Layered unit cell

Derived unit cell

The Crystal type CsCl belongs to___________ *

1 point

SC

BCC

FCC

HCP​

Answer 1

Answer:

Ist: Irregular

2nd: 6

3rd:

4th: 14

5th:Three Dimensional

6th: Basis

7th: 7

8th:

9th: Primitive Unit Cell

10th: BCC

Answer 2

The correct answers to the questions are as follows:

1. Amorphous solids have irregular structures.

2. The Coordination number in the NaCl structure is 6.

3. Number of lattice points in a primitive cell is one.

4. The number of Bravais lattices is 14.

5. The crystal lattice has a Three-dimensional arrangement.

6. Lattice + basis = Crystal Structure.

7. The number of crystal systems is 7.

8. The Intercepts of a plane in the crystal are given by a b/2, 3c in a simple cubic unit cell, Miller indices are (361).

9. A unit cell that contains lattice points only at the corners is known as a Primitive unit cell.

10. The Crystal type CsCl belongs to BCC.

Explanation:

1. The above questions are based on crystallography and Solid State topics.
2. We know that 2 types of solids exist i.e., Amorphous solids and Crystalline solids.
3. And a unit cell is the smallest group of atoms that has the overall symmetry of a crystal, and from which the entire lattice can be built up by repetition in three dimensions.
4. Coordination number of an atom is the number of atoms or ions surrounding immediately the atom.
5. In total, 14 Bravais lattices are present, and 7 crystal systems are triclinic, monoclinic, orthorhombic, tetragonal, cubic, trigonal, and hexagonal.
6. And talking about miller indices, they are a representation of a plane. And to calculate the miller indices of a particular plane, we will reciprocate the intercepts and then multiply them with the LCM.
7. CsCl crystals are formed by a bcc crystal lattice where Cl− occupies the corners and Cs+ occupies the center of the cube.

This is the information required to answer the above questions.

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