# Solid State - Online Test

Q1. Which among the following is not an example of amorphous solids?
Explaination / Solution:

Quartz is not amorphous solids
Q2. Amorphous solids are also known as
Explaination / Solution:

Because they show property of flowing like liquids

Q3. Which among thThey do not show long range ordere following is not true for crystalline solid?
Explaination / Solution:

In Crystalline solids , the atomic pattern repeats itself after long distance. Therefore they have long range orders.

Q4. Which among the following is an example of network solid?
Explaination / Solution:

Carbon is network solid due to its tendency to form Catination.

Q5. How many tetrahedral voids can exist per unit cell in hexagonal close packing sphere?
Explaination / Solution:

For hcp packing Z(no. of atoms per unit cell is 6) and no. of Td voids are 2Z.

Q6. Example of ferromagnetic substance is
Explaination / Solution:

This is a Fact

Q7. Coordination number of hcp and ccp is
Explaination / Solution:

In hcp and ccp lattice, each atom is surrounded by 12 other atoms . Therefore, hcp and ccp lattice have ccordination no. 12.

Q8. Brass is an example of
Explaination / Solution:

Brass is Mettalic Crystal

Q9. What is the total number of atoms per unit cell in a face centered cubic structure?
Explaination / Solution:

In Fcc each atom at corner contributes 1 per unit cell while atoms at face centers contribute 3 to each unit cell. So Total no of atoms per unit cell is 4

Q10. The number of atoms per unit cell in a body centered cubic structure is
Explaination / Solution:

Atoms at corner contribute 1 to a unit cell and one atom is present in body center contribute 1. So total no. of atoms per unit cell is 2.