Rice is not a chemical change it is a food plant
Heat causes the breakdown of starches (long chain carbohydrates) into simpler to digest sugars (mono and dimer carbohydrates). This involves breaking chemical bonds, so it is a chemical change.
Yes, cooked rice is an example of a physical change. This is because the rice undergoes a change in form, texture, and appearance when it is cooked, but the chemical composition of the rice remains the same.
Because cooking involve also chemical reactions.
Yes, because the preparation involve chemical processes.
Boiling rice is primarily a physical change, but it can involve some chemical changes as well. When rice is boiled, the heat causes the starches within the rice grains to gelatinize, changing their structure and making them softer and more palatable. While the boiling process itself is physical, the interaction of water and heat can lead to slight chemical changes in the starches and proteins in the rice. However, the predominant changes during boiling can be classified as physical rather than chemical.
Sleeping involve some chemical reactions and physical phenomenons but I suppose that it is exaggerate to consider sleep as a chemical/physical change.
no rice is food. Rice is a mixture of chemicals - mainly proteins, carbohydrates and lipids. The proteins include around fifteen amino-acids, the most abundant being glutamic acid, chemical formula C5H9NO4.
no because it is reversible. If you dissolve out the water you are left with NaCl. A change that is reversible is a physical change.
Chemical changes are certainly part of what is happening.
it is a physical change
Foodstuff contains chemical energy.
Difficult to be correct; chemists consider the higroscopy as a chemical phenomenon but I believe that some physicists has another opinoin.