physical and chemical
what is an chemical reaction?
rusting of iron, burning of wood, digestion of food, cooking an egg, and mixing baking soda.
How do you reverse an chemical reaction?
You can't reverse an chemical reaction
How can you reverse an physical change?
Physical changes can often be reversed because they don't alter the substance's chemical identity. For example, melting ice can be reversed by refreezing the water. Similarly, dissolving salt in water can be reversed by evaporating the water, leaving the salt behind.
what is a physical change give an example?
A physical change is a change in the form or appearance of a substance without changing its chemical composition.