Zn gives H2 gas with H2SO4 and HCl but not with HNO3 because:
Held on 30 Apr 2002 · Verified 9 Jul 2026.
Zn acts as an oxidizing agent when reacts with HNO3
HNO3 is weaker acid than H2SO4 and HCl
in electrochemical series Zn is above hydrogen
NO3−is reduced in preference to hydronium ion
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