What do you mean by Nitric ratio?
(a) Ratio of wt of 100% HNO3 / wt of materials being nitrated
(b) Ratio of wt of 100% HNO3/ wt of 100% H2SO4
(c) Ratio of wt of 100% H2SO4/ wt of materials being nitrated
(d) Ratio of wt of 100% H2SO4/ wt of 100% HNO3