How many following metals evolve NO (Nitric oxide) gas with dil. \( \mathrm{HNO}_{3}(20 \%) \) ?...

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How many following metals evolve NO (Nitric oxide) gas with dil. \( \mathrm{HNO}_{3}(20 \%) \) ? \( \mathrm{Hg}, \mathrm{Cu}, \mathrm{Pb}, \mathrm{Zn}, \mathrm{Fe}, \mathrm{Al}, \mathrm{Ag}, \mathrm{Au}, \mathrm{Mn} \)
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