How many following metals evolve `N_(2)O` gas with dil. `HNO_(3)` (20%)
Cr, Cu, Pb, Zn, Fe, Al, Ag, Au, Mn.

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

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

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

How many of following elements will liberate H_2 gas when treated with dil HNO_3 ? Mg, Zn, Sn, Pb

How many of the following metals dissolve in boiling alkali to produce H_(2) gas ? Cu,Ni,Zn,Be,Ag,Fe,Mn,Sn,Al .