Concept of 'Is Matter Around Us Pure' (Part - 3)

Separation of two miscible liquids Acetone and Water

Step 1. Take a flash and join thermometer.

Step 2. Arrange all apparatus as shown in figure.

Step 3. Heat the mixture.

Step 4. Now acetone is vaporize condenses in the condenser and collected in condenser outlet.

Step 5. Now water is left in flask.

This process is known as Distillation Process. It can be used for less difference components. It can be used on components less than temperature 25 K .

science-ncert-solution

Obtaining Gases from Air

Step 1. Air compressed by increasing pressure .

Step 2. Now it cools to get air in liquid state.

Step 3. Now liquid air is allowed to frictional distillation column.

Step 4. Now we see gases separated at different height due to difference in their boiling points.

Physical and Chemical changes

The property that can be observed and specified like as color, boiling point, melting point, density etc is known as Physical changes.

If we get a new substance after change in chemical properties of matter is known as Chemical changes.

Elements

It’s the basic form of matter that can not be broken out.

It can be divided into metals, non-metals and metalloids.

Properties of metal

1. Shiny

2. Grey or Yellow colour Like gold, silver.

3. Good conductor of Heat and Electricity.

4. Ductile in nature.

5. Malleable in nature.

6. Sonorous in nature.

Example Gold, Silver, Copper, Iron etc.

Properties of Non – metal

1. It is in multi colouring.

2. Bad conductor of Heat and Electricity.

3. Not Shiny

4.Not Malleable in nature.

5. Not Sonorous in nature.

Example Oxygen, Carbon, Hydrogen, Chlorine etc

Compound

It is a substance in which two are more than two compound combined chemically. It is combustible and colourless.

Milan Tomic

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