Silver is a chemcial. More specifically, it is an element.
chemical change as a new substance is formed
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Chemical
A change in state is a physical change because the chemical composition of the substance remains the same.
Physical. The water changes its state of matter from liquid to gaseous. No chemical reaction (i.e. change) going on there.
Tarnish on silver is Silver Oxide, which is oxidised silver. This is indeed a chemical reaction.
Tarnishing of silver is a chemical change. It occurs when silver reacts with sulfur-containing substances in the air to form silver sulfide, which is the black tarnish seen on the surface of the metal. This change is irreversible and alters the composition of the silver.
a chemical change
physical
physical
Chemical change
Chemical change