Potatoes contain starch and thus give positive test for starch with iodine solution.

Vitamin C is a nutrient which can not tolerate high temperature and gets destroyed on over heating.

Different vitamins play different roles in our body. Vitamin C helps fight against diseases. Vitamin D promotes the absorption of calcium from food and helps our body use calcium for bones and teeth.

Glucose is a monosaccharide sugar, rest are disachharides in nature.

Roughage (dietary fibers) is provided by all plant products like fruits, pulses, vegetables, etc. It acts as food for animals, helps us in getting rid of the undigested food from the body and keeps our skin healthy.

Sufficient amount of iodine is required by our body for maintaining a balanced mental status.

Sugar is the generalised name for sweet, short-chain, soluble carbohydrates, many of which are used in food.

Vegetable oils contain unsaturated fats. Many vegetable oils are used to make soaps, skin products, candles, perfumes and other personal care and cosmetic products. Some oils are particularly suitable as drying oils, and are used in making paints and other wood treatment products. 

Proteins are called the building blocks of life. Proteins are made up of varying combinations of nitrogen-containing amino acids. There are twenty different amino acids that are important to the body. These twenty combine together in hundreds of intricate chemical patterns to create a variety of complex protein structures. 

Goiter - swollen neck glands Scurvy - bleeding germs Rickets - bow shaped legs Beriberi - weak muscles and laziness

The diet of student ‘A’ contains adequate amount of all the essential nutrients and is considered as a balanced diet.

Vitamin C keeps gums healthy.

Iron is essential for forming haemoglobin in the blood.

To maintain the nutrient content of the body for the optimal growth, one should eat a balanced diet. A balanced diet basically includes 5 major nutrients: proteins, fats, carbohydrates, vitamins and minerals. Although water and dietary fibers make a part of our diet, but water is not included in nutrients.