which among the following are physical or chemical changes?

 Cutting of trees → Physical change   Melting of butter in a pan → Physical change   Rusting of almirah → Chemical change   Boiling of water to form steam → Physical...

Following are Chemical changes.  (a)Growth of a plant  (b)Rusting of iron  (c) Cooking of food  (d)Digestion of food  (e) Burning of a candle.

(c) (i), (iii) and (iv)

(a) (i) and (ii) 

Physical properties – (a) and (c)  Chemical properties – (b) and (d)

Physical Changes: (b) Dissolving sugar in water, (d) Melting of wax, (e) Beating Aluminium to make Aluminium foil. Chemical Changes: (a) Photosynthesis, (c) Burning of coal, (f) Digestion of food

Physical Changes: On heating, candle wax gets melted is a physical change. Since it again turns into solid wax on cooling. Chemical Changes: The wax near to flame burns and gives...

There are various physical and physiological advantages of exercise for children which are described below: Exercise Controls Weight: Regular exercise helps in controlling weight. In fact weight gain occurs when child takes...

(i) and (iii) are physical changes (ii) and (iv) are chemical changes

Physical changes: Evaporation of petrol, heating of an iron rod to red hot, sublimation of solid ammonium chloride. Chemical changes: Burning of Liquefied Petroleum Gas (LPG), curdling of milk.