Among the following changes that occur in the home kitchen, the physical change is that A s rice is

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. During the combustion process of liquefied gas, new substances such as carbon dioxide are generated, which is a chemical change B. The water in the refrigerator only changes its state during the freezing process, and no new substances are generated, which is a physical change >>>More

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

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

A. Natural gas combustion produces water and carbon dioxide, which is a chemical change, so the choice is wrong; >>>More