Is Matter Around Us Pure Solution

Which of the following are chemical changes?(a) Growth of a plant(b) Rusting of iron(c) Mixing of iron filings and sand(d) Cooking of food(e) Digestion of food(f) Freezing of water(g) Burning of a candle.

10. Classify the following into elements, compounds and mixtures. (a) Sodium, (b) Soil, (c) Sugar solution, (d) Silver, (e) Calcium

Which of the following will show the Tyndall effect