Question

state one major diffrence between chemical and physical change

Answer 1

A physical change is reversible but a chemical change is not.
physical change is a change in which no new substance is formed while in chemical change one or more substance is formed

Answer 2

physical change is concerned with change in intermolecular force of attraction N intermolecular distances...for ex. change in state from liq to gas.. i.e vapourization N chemical change is change in properties of an element or compound under different pressure N temperature condition ..N yes the impn difference is that physical change is a reversible reaction while chemical change is irereversible reaction for eg .. burning of coal
..

..
i hope it helpss