Classify the following as physical or chemical changes :

Classify the following as physical and chemical changes. (i) Conversion of milk into curd (ii) Burning of magnesium ribbon in air (iii) Rusting of iron nails (iv) Dissolving salt in water (v) Burning of cool (vi) Electrolysis of sodium chloride solution by passing current (vii) Crystallisation of copper sulphate.

Classify the following into physical and chemical changes. Burning of wax

Classify the following into physical and chemical changes. Glowing of a bulb

Classify the following into physical and chemical changes. breaking of glass

Classify the following into physical and chemical changes. freezing of water

Classify the following into physical and chemical changes. burning of coal

Classify the following into physical and chemical changes. Ripening of fruits

Classify the following into physical and chemical changes. fermentation of alcohol

Classify the following into physical and chemical changes. Rusting of iron