When a candle is burnt, what type of changes take place? Give another�

1.	When a candle is burnt, what type of changes take place? Give another example of a similar process.
Answer» 1. When a candle is burnt both physical and chemical changes take place. 2. Burning of candle giving heat and light and reducing its size is a chemical change. 3. The wax melted during burning again condenses to solid wax is a physical change. 4. Part of the candle burnt is a permanent change and it cannot be reversed. 5. Due to the burning of the candle, carbon dioxide and water vapour are produced. Examples: 1) Burning of LPG in our kitchen. 2) Liquid state of LPG in the cylinder is converted into a gaseous state when comes out This is a physical change. 3) When LPG burns in air heat is produced, this is a chemical change.

When a candle is burnt, what type of changes take place? Give another example of a similar process.

Answer»

1. When a candle is burnt both physical and chemical changes take place.

2. Burning of candle giving heat and light and reducing its size is a chemical change.

3. The wax melted during burning again condenses to solid wax is a physical change.

4. Part of the candle burnt is a permanent change and it cannot be reversed.

5. Due to the burning of the candle, carbon dioxide and water vapour are produced.

Examples:

1) Burning of LPG in our kitchen.

2) Liquid state of LPG in the cylinder is converted into a gaseous state when comes out This is a physical change.

3) When LPG burns in air heat is produced, this is a chemical change.