Question

The gas turns $KI$ paper brown. It gives reddish brown fumes. Guess the anion.

• A. $N{O}_3^{-}$
• B. $C{l}^{-}$
• C. $S{O}_3^{2-}$
• D. $C{O}_3^{2-}$

Answer 1

The correct option is A $N{O}_3^{-}$

The anion which gives reddish brown fumes and turns potassium iodide paper brown is nitrate ion.