2 Answers

Guillaumepotier · Answer 1 · 2018-03-09T07:30:26+0000

Color change, almost sure.

Changing state is a physical change, i.e. Water to ice to water. Color change is usually a sign of an irreversible chemical change

Agartzke · Answer 2 · 2018-03-12T08:22:41+0000

I would say "B" because for it to change into a liquid energy must be applied to it and thus it is going through a chemical change.

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