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Zn gives H2 gas with H2SO4 and HCl but not with HNO3 because

Zn gives H2 gas with H2SO4 and HCl but not with HNO3 because

Grade:12

2 Answers

Arun
25750 Points
5 years ago
Dear student
 
Nitric acid is a very strong oxidising agent and hence it leads to the addition of oxygen to another substance. Thus when hydrogen is formed due to addition of nitric acid on zinc metal it oxidises hydrogen to water and thus the reaction becomes 
Zn + 4HNO3 ---> Zn(NO3)2 + 2NO2 +2H2O
mainak paul
13 Points
5 years ago
it's vey simple...cz NO3(-) is reduced in preference to hydronium ion..that's why zn doesn't evolve H2 with HNO3

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