Water is not a reaction at all. If you mean to ask if a state change in water is chemical or physical, it is physical.
The absorption of water is not a chemical reaction.
Its a chemical reaction :]
Chemical reaction from water
Sand and water do not react, they simply mix. This is a physical process.
No. It's a physical reaction.
During boiling the chemical composition is not changed.
No, it's a physical reaction because it is still water just in a different form.
A water pipe bursting is a physical reaction. It does not involve any chemical changes in the water itself, but rather a physical change in the structure of the pipe, causing it to break and release the water inside.
A reaction with water (hot or cold) is a chemical reaction.
Water boiling is a physical change and not a chemical reaction. In a physical reaction there is no new substance formed as is the case with chemical reactions. In boiling water there is no new substance produced.
This is a chemical reaction, a chemical change.
No, mixing cornstarch with water is not a chemical reaction. It is a physical change. The cornstarch particles disperse throughout the water, but no new substances are formed.