What happens when zinc granules are treated with dilute solution of H2SO4,HCI,HNO3,NaCI and NaOH? Also write the chemical equations if reaction occurs.
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Solution
The reaction of Zn granules with (i) dilute H2SO4 Zn(s)+H2SO4(aq)→ZnSO4(aq)+H2(g) (ii) dilute HCl Zn(s)+HCl(aq)→ZnCl2(aq)+H2(g) (iii) dilute HNO3 Reaction with dilute HNO3 is different as compared to other acids because nitric acid is an oxidising agent and it oxidises h2 gas evolved to H2O 4Zn(s)+10HNO3(aq)→4Zn(NO3)2(aq)+5H2O(l)+N2O(g) (iv) NaCl solution Zn(s)+NaCl(aq)→Noreaction (v) NaOH solution Zn(s)+2NaOH(aq)→Na2ZnO2(aq)sodiumzincate+H2(g)