Question

give right answer only ​

Answer 1

1. melting of ice is a physical change because we can reverse it and physical changes are reversible
2. dissolution of sugar in water is a physical change because after dissolving sugar in water we can get it back by boiling
3. burning of wood is a chemical changes because after burning wood we cannot get it back and a new substance will form which is ash
4. 4 I don't know
5. melting of wax is a physical change because after melting wax we can get it back by freezing