Question

Classify the following as chemical or physical changes 1) Rusting of almirah 2) Boiling of water 3) Burning of paper 4) Cutting of trees 5) Melting of butter in a pan 6) Making a food salad 7) Burning Of Candle 8) Cooking Of Food 9)Digestion Of Food 10) Freezing Of Water 11) Dissolving Common Salt In Water 12)Growth Of Plants

Answer 1

Answer:

(I) I can't lnow

Explanation:

(ii) melting of butter in a pan is a physical change. (iii) rusting of almirah is a chemical change. (iv) boiling of water to form steam is a physical change. (v) passing of electric current, through water and the water breaking down into hydrogen and oxygen gases is a chemical change.

Answer 2

Answer:

(ii) melting of butter in a pan is a physical change. (iii) rusting of almirah is a chemical change. (iv) boiling of water to form steam is a physical change. (v) passing of electric current, through water and the water breaking down into hydrogen and oxygen gases is a chemical change.