The metal which does not form ammonium nitrate by reaction with dilute nitric acid is:
A nitrate which does not produce nitrogen dioxide on heating.
A nitrate which does not leave black residue on heating
Dilute nitric acid is considered as a typical acid but not so in its reaction with metals
A metallic nitate that decripitates on heating
Among Mg, Cu, Fe, Zn, the metal that does not produce hydrogen gas in reaction with hydrochloric acid is.