Classify the following as chemical or physical changes :
`**` cutting of trees.
`**` melting of butter in a pan,
`**` rusting of almirah,
`**` boiling of water to form steam,
`**` passing of electric current, through water and the water breaking down into hydrogen and oxygen gases.
`**` dissolving common salt in water,
`**` making a fruit salad with raw fruits, and
`**` burning of paper and wood.

Explanation

Please note that a change which can be easily reversed is a physical change while the one which cannot reversed is a chemical change in nature. Based on this concept, the changes that are listed may be classified as :
(1) Chemical change (ii) Physical change (iii) Chemical change (iv) Physical change
(v) Chemical change (vi) Physical change (vii) Physical change (viii) Chemical change .