Give reasons for the following.1. Gases can be compressed easily.2. Li

1.	Give reasons for the following.1. Gases can be compressed easily.2. Liquids can flow easily.3. We need to classify things.4. Pure substances have fixed melting or boiling points.5. Electricity is not considered matter.
Answer» 1. The reason for this property of gases is that there is very large intermolecular space between gas molecules. On mere applying pressure, they are easily compressed. 2. In liquids, intermolecular force is weaker than that of solids. So molecules in a liquid can slip over one another and liquids can flow, unlike solids. 3. We need to classify things in order to distinguish them. In this way, things can be categorized and can be easily studied. 4. 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. 5. Electricity neither has mass nor it occupies space. Besides, it cannot be seen by our eyes. This is why electricity is not considered the matter.

Give reasons for the following.1. Gases can be compressed easily.2. Liquids can flow easily.3. We need to classify things.4. Pure substances have fixed melting or boiling points.5. Electricity is not considered matter.

Answer»

1. The reason for this property of gases is that there is very large intermolecular space between gas molecules. On mere applying pressure, they are easily compressed.

2. In liquids, intermolecular force is weaker than that of solids. So molecules in a liquid can slip over one another and liquids can flow, unlike solids.

3. We need to classify things in order to distinguish them. In this way, things can be categorized and can be easily studied.

4. 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.

5. Electricity neither has mass nor it occupies space. Besides, it cannot be seen by our eyes. This is why electricity is not considered the matter.

Give reasons for the following.1. Gases can be compressed easily.2. Liquids can flow easily.3. We need to classify things.4. Pure substances have fixed melting or boiling points.5. Electricity is not considered matter.

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