Question

write difference between physical and chemical change

Answer 1

physical change-a change in which molecular structure of substance does not change
chemical change-molecular structure of substance changes in this change, i.e., the substance is no longer what it used to be before change on molecular change

Answer 2

Answer:

Physical Change- A physical change is the one in which

• The substance undergoing the change is not destroyed
• no new element it or compound is formed
• Only the colour, shape, or size of the substance may change
• For example - Drying of clothes is a a physical change

Chemical Change- A chemical change is the one in which

• New substances are formed
• Properties of the substance before and after the change are different
• Original properties disappear and new properties are observed
• Change is brought permanently and change is irreversible
• For example - Souring of milk