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Cold dilute nirtic acid would dissolved how many of the following without significant evolution of any gas:
`Pb, Mg,Sb, Au, Ag,Fe, Mn, Sn,P_(4)`

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NO is evolved with Pb, Sb, Ag `P_(4)`
`NH_(4)NO_(3)` is formed and no gas is evolved with Mg, Fe, Mn, Sn.
No reaction with Au

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