A filter paper soaked in salt X tums brown when exposed to `HNO_(3)` capor. The salt X is

A filter paper soaked in salt X turns brown when exposed to HNO_(3) vapour. The salt X is

A salt, when warmed with zinc powder and an NaOH solution, gives a gas that turns a filter paper soaked with an alkaline solution of K_(2)[HgI_(4)] brown. The salt responds to the brown ring test when acetic acid is used in place of sulphuric acid. The anion present in the salt is:

A salt, when warmed with zinc powder and an NaOH solution, gives a gas that turns a filter paper soaked with an alkaline solution of K_(2)[HgI_(4)] brown. The salt responds to the brown ring test when acetic acid is used in place of sulphuric acid. The anion present in the salt is:

A white sodium salt dissolves in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the solution, a white ppt. is obtained which does not dissolves in dil. HNO_(3) . The anion is

A white sodium salt dissolves in water to give a solution which is neutral to litmus.When silver nitrate solution is added to the solution, a white precipitate is obtained which does not dissolve in dilute HNO_(3) .The anion is