Q1. What is photosynthesis? Ans: The process by which green plants and some other organisms use sunlight to create nutrients from CO 2 and H 2 O. Photosynthesis requires the green pigment called chlorophyll and gives out oxygen as a by-product. Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy. Q2. What is starch? Ans: starch is the most complex carbohydrate compound. It is a biodegradable product . It is a polysaccharide (a carbohydrate e.g. starch, cellulose whose molecules consist of a number of sugar molecules bonded together. ) and glucoside (chemical compound) reserve of plants. STARCH TEST The iodine-starch test is a chemical test that is used to test the presence of starch in a leaf (mainly) or an object. Materials required: 1. Water 2. C2H5OH (alcohol/ethanol) 3. ...