Isabella Patel——Studied at the University of Zurich, Lives in Zurich, Switzerland.
Explanation: because, in chemical reaction new substance appear but in the physical process like boiling process there will be no new substance appear. So, it is a physical change.read more >>
QuesHub is a place where questions meet answers, it is more authentic than Quora, but you still need to discern the answers provided by the respondents.