## Chapter Chosen

Mechanical Properties of Solids

## Book Store

Currently only available for.
CBSE Gujarat Board Haryana Board

## Previous Year Papers

Download the PDF Question Papers Free for off line practice and view the Solutions online.
Currently only available for.
Class 10 Class 12
Amorphous substances do not have sharp melting point but get softening range before melting, while crystalline substances have sharp melting point. Explain.

Amorphous substances possess short-range arrangement of atoms or molecules. These short and ordered arrangement disappears gradually on heating. Before melting, this gradual change makes the amorphous substance soft.

While in crystalline substances, there is a long-range order arrangement of atoms or molecules. This arrangement disappears at a definite temperature and hence have sharp melting points.
291 Views

What is the nature of inter-atomic or inter-molecular forces?

Inter-atomic or inter-molecular forces are electrostatic in nature.

637 Views

Define interatomic forces and give an example?

The force between atoms of the molecule is called interatomic force.

E.g.The nucleus and electron cloud of a molecule is binded by electrostatic force.
1032 Views

What is the force of cohesion?

Cohesive attraction or cohesive force is the force of attraction between same types of molecules sticking together.
651 Views

What do you understand by intermolecular forces?

Intermolecular force is the force between the molecules of the substance is called intermolecular force.

There is a dipole-dipole interaction between the molecules.
630 Views

What is the force of adhesion?

Adhesive force is the attractive force between two unlike molecules. They are caused by forces acting between two substances like electrostatic force (attraction due to opposing charges), mechanical force etc.

E.g., Force of attraction between gum and paper.

587 Views