Among the following changes that occur in the kitchen, which do not include chemical changes, is the

A. There is no new substance generation in the process of salt dissolution, which is a physical change B. Only the state changes in the process of peanut oil solidification, and no new substance is generated, which is a physical change C. Only the state is changed in the water boiling process, and no new substance is generated, which is a physical change D. There is a new substance rust generation in the process of kitchen knife rusting, which is a chemical change Therefore, D

A. It involves the combustion of substances, C. It is the slow oxidation of iron and oxygen, and D is the slow oxidation of vegetables and oxygen, all of which are formed by other substances, which are chemical changes, and B is only a state change, and there is no other substance generation, so it is a physical change, so choose B

There is no new substance generation in the juice squeezed by B, so it is a physical change, and there is a new substance generation in apple rotting and kitchen knife rusting, which is a chemical change, so B. is chosen

B.Boiling water boils, this is just the water temperature reaches 100 degrees and continues to absorb heat so it boils, of course, 100 degrees water does not boil without heating. Although water changes from liquid to gaseous, its chemical structure remains unchanged. >>>More

Answer C filtered soybean milk, juice extraction, activated carbon adsorption refrigerator odor did not generate new substances, which belongs to physical changes, and bread deterioration is a slow oxidation of bread, which is a chemical change, so choose C