In `Fe(II)-MnO_4^-` titration, `HNO_3` is not used because :

Aniline when treated with conc. HNO_3 gives

In dilute aqueous H_2SO_4 , the complex diaquodioxalato ferrate (II) is oxidized by MnO_4^- . For this reaction, the ratio of the rate of change of [H^+] to the rate of change of [MnO_4^-] is

The brown gas formed when HNO_3 is reduced by metals is

C Cl_(4) is used as a fire extinguisher because

When silver is heated with conc. HNO_3 it produces

When copper is heated with conc. HNO_3 it produces

MnO_4^(-) ions are reduced in acidic condition to Mn^(2+) ions whereas they are reduced in neutral condition to MnO_2 . The oxidation of 25 ml of a solution X containing Fe^(2+) ions required in acidic condition 20 ml of a solution Y containing MnO_4^(-) ions. What volume of solution Y would be required to oxidise 25 ml of solution X containing Fe^(2+) ions in neutral condition ?

Amount of oxalic acid present in a solution can be determined by its titration with KMnO_4 solution in the presence of H_2SO_4 . The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl