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What happens when zinc granules are treated with dilute solutions of H2SO4, HCl, HNO3, NaCl and NaOH ? Also write the chemical equation.

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What happens when zinc granules are treated with dilute solutions of H2SO4, HCl, HNO3, NaCl and NaOH ? Also write the chemical equation.

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(i) With dil. H2SO4 : H2 gas is evolved. 

Zn + H2SO4 → ZnSO4 + H2 ↑ 

(ii) With dilute HCl : H2 gas is evolved. 

Zn + 2HCl → ZnCl2 + H2 ↑ 

(iii) With dilute HNO3 : H2 gas is evolved. 

Zn + 2HNO3 → Zn(NO3)2 + H2O + H2 ↑ 

(iv) With dilute NaCl : No chemical reaction takes place. 

(v) With dilute NaOH : Sodium zincate is formed and H2 gas is evolved. 

Zn + 2NaOH → Na2ZnO2 + H2 ↑

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