Consider a mixture ' X ' which is made by dissolving 0.4 mol of [ Co ( NH_3)_5 SO_4] Br and 0.4 mol of [ Co ( NH_3)_5 Br ] SO_4 in water to make 4 L…

Consider a mixture ' X ' which is made by dissolving $\displaystyle 0.4$ mol of $\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{SO}_4\right] \mathrm{Br}$ and $\displaystyle 0.4$ mol of $\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Br}\right] \mathrm{SO}_4$ in water to make $\displaystyle 4$ L of solution. When $\displaystyle 2$ L of mixture ' X ' is allowed to react with excess of $\displaystyle \mathrm{AgNO}_3$, it forms precipitate ' Y '. The rest $\displaystyle 2$ L of mixture 'X' reacts with excess $\displaystyle \mathrm{BaCl}_2$ to form precipitate 'Z'. Which of the following statements is CORRECT?