80. (i) Dilute Nitric acid is generally considered a typical acid except for its reaction with metals. In what way is dilute Nitric acid different from other acids when it reacts with metals?   81. (ii) Write the equation for the reaction of dilute Nitric acid with Copper.   82. (iii) Account for the yellow colour that appears in concentrated Nitric acid when it is left standing in an ordinary glass bottle.