addition of zinc nitrte to water is physical change but addition of zinc to dilute nitrate acid is a chemical change give reason
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When Zinc nitrate is pored in the water it does not react with water.
It dissociates into the ions Zn⁺ and NO₃²⁻ . No zinc hydroxide is formed.
Thus addition of Zinc nitrate into the water is a Physical change, as chemical properties of zinc nitrate in water remain as such.
While adding Zinc to dilute Nitric acid , we get
3Zn (s) + 8HNO₃ (dil) (l) → 3Zn(NO₃)₂ + 2NO+ 4H₂O
which is a Chemical reaction.Because zinc becomes zinc nitrate, besides producing nitrogen oxide and water.
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