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Chapter 17 - Physics of Solids - 7
1.
Crystalline solids have ordered structure.
a) False
b) True
2.
The co-hesive force between atoms, molecules or ions of a crystalline solid does not maintain long range order in spite of atomic vibrations.
a) False
b) True
3.
Amorphous solids have regular arrangement of molecules.
a) True
b) False
4.
Polymers form a large group of naturally occurring and synthetic material.
a) False
b) True
5.
The smallest three dimensional structure is called a unit cell.
a) False
b) True
6.
Polythene, ploystrene and Nylon are examples of polymers.
a) True
b) False
7.
No deformation is produced when a body is subjected to external force .
a) False
b) True
8.
In a solid atoms are held about their equilibrium position due to interatomic cohesive forces.
a) False
b) True
9.
Deformation is produced in a unit cell of a crystal when an external force is applied on it.
a) True
b) False
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