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Question

What happens when zinc granules are treated with dilute solution of H2SO4, HCl, HNO3, NaCl and NaOH? Also write the chemical equations if reaction occurs.

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Answer

ReagentReactionProducts
Dilute H₂SO₄Zn + H₂SO₄ → ZnSO₄ + H₂↑Zinc sulfate + Hydrogen gas
Dilute HClZn + 2HCl → ZnCl₂ + H₂↑Zinc chloride + Hydrogen gas
Dilute HNO₃Zn + 2HNO₃ → Zn(NO₃)₂ + H₂↑Zinc nitrate + Hydrogen gas
Conc. HNO₃Zn + 4HNO₃ → Zn(NO₃)₂ + 2NO₂ + 2H₂OZinc nitrate + Nitrogen dioxide + Water
NaClNo reaction–
NaOH (hot, conc.)Zn + 2NaOH + 2H₂O → Na₂Zn(OH)₄Sodium zincate

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