Question

One situation indicates a physical change rather than a chemical change. Which situation indicates a physical change?
A) Solid copper melts to form liquid copper.
B) A firecracker explodes on the fourth of July.
C) Water reacts with the iron on your bicycle to form rust.
Reactivate
D) Magnesium metal is mixed with hydrochloric acid and hydrogen gas is formed.

Answer 1

(A) is physical change.

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