Question

Write the characteristic of chemical change.

Answer 1

Following are the characteristic of chemical change

• A chemical change is a change of materials into another, new materials with different properties and one or more than one new substance are formed.
• The specific properties of the substance change completely after the chemical change.
• A new substance is produced as a product of chemical change.
• The apparent weight of a substance changes when it undergoes a chemical change.
• Net absorption or release of energy takes place during a chemical change.
• Chemical changes are permanent changes and cannot be reversed by removing the cause of the change.

Examples of chemical changes.

• Burning of candle
• Digestion of food
• Curdling of milk
• Formation of biogas
• Burning of petrol or diesel
• Rusting of iron
• Ripening of fruit
• Clotting of blood
• Fading of the color of a dyed cloth