Question

6to7 differences between chemical and phisical changes

Answer 1

physical changes are temporary , reversible , the chemical composition is unaltered ,no new products are formed  there is no change in mass because no matter is added or removed ,there is no gain or loss of energy

while chemical change is permanent ,irreversible ,new substance is formed, the composition and properties are altered there is a change in mass because matter is added or removed , energy is either absorbed or rejected 
eg of physical change is melting  of ice 
eg of physical change is burning of magnesium

Answer 2

chemical changes are performed by chemical reactions whereas phisical changes are done normally .
chemical bonding takes place in chemical changes .
phisical changes are done phisically.
chemical changes can be neither destroyed nor invented.
physical changes destroyed or invented.
the examples of chemical changes are formation of curd, filtration of water etc .
the examples of physical changes are breaking of wood ,tearing of clothes.