Chemistry

Problem

White crystal (A) on treatment with

\text{AgNO}_3

gives white crystalline precipitate. (A) discharge the colour of

\text{KMnO}_4

solution but no gas is evolved. Probable radical present in (A) is: a.

\text{Cl}^-

\text{Br}^-

\text{NO}_2^-

\text{CO}_3^{2-}