A) a chemical reaction
B) a physical change
C) Crystallization
D) None of these
Correct Answer: A
Solution :
\[\text{Zn(s)+2HCl(aq)}\to \text{ZnC}{{\text{l}}_{\text{2}}}\text{(aq)+}{{\text{H}}_{\text{2}}}\text{(g)}\uparrow \]
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