How many following metals evolve N2O gas with dil. HNO3 (20%)? Cr, Cu, Pb, Zn, Fe, Al, Ag, Au, Mn | Reaction Mechanism — Chem-Mantra | Chem-Mantra

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How many following metals evolve N2O gas with dil. HNO3 (20%)? Cr, Cu, Pb, Zn, Fe, Al, Ag, Au, Mn

Answer: **5** / ALL THOSE METALS WHICH ARE MORE ELECTROPOSITIVE THAN HYDROGEN IN ELECTROCHEMICAL SERIES GIVES N2O GAS WITH DIL. HNO3(20%) EXCEPT PB AND SN. -> CR, ZN, FE, AL, MN.

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