It involves breaking molecular bonds between copper compounds
Generally yes. Smelting is used to separate raw ores into their component pieces to extract the pure metal, and in most cases this will involve chemical reactions of some form.
The change resulted in a new property.
Weathering
The appearance of a colored solution indicates a chemical reaction has occurred.
A chemical change is a chemical reaction.
Chemical reactions are chemical processes.
It indicates a chemical reaction because it changes from one substance to another.
change into new substances
Bleach
I believe the word you are searching for is Reactivity?
Yes, because the preparation involve chemical processes.
Yes, it is true; this technology involve chemical processes.
Chemical, as rust is iron oxide. The iron is turning from iron to iron oxide, which (as you can see) is a chemical change. In general, a colour change usually indicates a chemical change.
The chemical composition of foods is changed during cooking.
There is a bit of both. The processes of spinning and weaving are purely physical. Bleaching and dyeing are chemical.
This darkening involve chemical reactions.
Drying of leaves is a physical change because neither it changes its composition nor does it have any different properties from the original one.