define physical and chemical change
Answers
Physical change is without change in chemical property.
Chemical change is with change in chemical property.
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♤PHYSICAL CHANGES♤
Changes in the Physical Properties of a Substance are known as Physical Changes. Physical Properties of a Substance include colour, size, shape, state, temperature, odour, appearance, texture and many more. In addition, Physical Changes do not lead to the formation of new substances. Physical Changes may or may not be reversible.
Examples of Physical Change
Examples of Physical ChangeBreaking/Crushing of any Object
Examples of Physical ChangeBreaking/Crushing of any ObjectExpansion of Metal on Heating
Examples of Physical ChangeBreaking/Crushing of any ObjectExpansion of Metal on HeatingDissolving Sugar or Salt (Solute) in Water (Solvent) (as a result, a solution is formed)
Examples of Physical ChangeBreaking/Crushing of any ObjectExpansion of Metal on HeatingDissolving Sugar or Salt (Solute) in Water (Solvent) (as a result, a solution is formed)Solidification of Molten Metal on Cooling
Examples of Physical ChangeBreaking/Crushing of any ObjectExpansion of Metal on HeatingDissolving Sugar or Salt (Solute) in Water (Solvent) (as a result, a solution is formed)Solidification of Molten Metal on CoolingShredding Paper
♤CHEMICAL CHANGES♤
One or more substances, at times, react with one another or substances which are readily available in the environment. This consequently leads to the formation of a new substance(s).
Examples of Chemical Change
Rusting of iron
Souring of Milk
Souring of MilkRipening of Fruits
Souring of MilkRipening of FruitsDigestion of Food
Souring of MilkRipening of FruitsDigestion of FoodBursting of Crackers