Solves Exercises 1. Classify the changes involved in the following processes as physical or chemical changes: (a) Photosynthesis (b) Dissolving sugar in water (c) Burning of coal (d) Melting of wax (e) Beating aluminium to make aluminium foil (f) Digestion of food Answers: (a) Photosynthesis – Chemical change (b) Dissolving sugar in water – Physical … Continue reading CLASS 7 SCIENCE CHAPTER 6 PHYSICAL AND CHEMICAL CHANGE NCERT SOLVED QUESTION ANSWER