Question

What are physical and chemical changes

Answer 1

Answer:

Key Points. Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions...it was hopefully...for you...tmx for free points

Answer 2

Explanation:

CHEMICAL CHANGE.

• It is a permanent change.
• The physical and chemical properties of matter changes and new substance are formed which do not get back into their original form by reversing the reaction.
• For example :- The burning of coal or wood, the curdling of milk, forming of rust on iron etc.

PHYSICAL CHANGE.

• It is a temporary change.
• The physical properties of the matter change and no new matter is formed and by reversing the reaction the matter changes into it's previous form.
• For example :- The melting of solid wax,the melting of ice etc.