chemical changes of cooking food

Physical and Chemical Changes..

Matter undergoes certain changes as a result of the application of energy. Glaciers melt in summer and rivers freeze in winter. Water from saltpans on the sea coast dry up, leaving behind salt. Water from the sea evaporates to from water vapor, which form into clouds and then conden..

..

..

..

Actually speaking, natural food substances are various forms of chemicals. For e.g., rice is a carbohydrate. Fruits contain carbohydrates and acids like citric acid. Vegetables contain proteins (amino acid blocks) and vitamins. Besides these, chemicals are also used as..

Question 11 - Question: Action of heat on blue vitriol is a physical as well as chemical change. Justify. Answer: When blue vitriol is a gradually heated, it undergoes a physical change to form a white powder. On adding a drop of water to the white powder, it chan..

- Physical Change Chemical Change No new or different substance is formed. The composition of the substance, that undergoes the change, remains unchanged Results in the formation of at least one new substance. The constituent particles of th..

The criterion for a chemical change is the production of one or more new substances. Therefore, certain conditions should be met in order to bring about a chemical change. The necessary conditions are: 1) A minimum amount of energy needed to initiate a reacti..