1 What is the relation between intermolecular space and intermolecular force of attraction? Ques :2 Give a reason why pure substance have fixed melting and boiling point?
OR
Ques: 2 Explain interconversion of states of matter by taking an example. Ques :3 Give a reason why electricity is not considered as matter? Ques: 4 Why do liquids and gases flow but solids so not? Ques: 5 Differentiate between atom and molecule.
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1. The force of attraction between the molecules of a given substance is called intermolecular force and the space between these molecules is called intermolecular space. The basic relation between the two is that they are inversely proportional to each other.
2. Pure substances consist of only one kind of matter. All the particles of a pure substance are alike. It has a definite composition and similar properties. This is the reason that pure substances have fixed melting or boiling points.
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