Question

What is the 5 difference between chemical change and physical change

Answer 1

chemical change:

1. it is irreversible.
2. it is a permanent change.
3. energy is produced
4. it is always accompanied by one or more new substance.
5. example :- burning of coal ,etc.

physical change:

1. it is reversible.
2. it is temporary change.
3. no energy is produced
4. the molecule are rearranged while their actual composition remain same.
5. example:- melting and boiling of water, melting of wax ,etc.