8.7gm of pyrolusite (impure `MmO_(2)`)  were heated with concentrated HCl. The `Cl_(2)` gas evolved
Channel: Doubtnut
Date: 2020-04-19

8.7gm of pyrolusite (impure `MmO_(2)`)  were heated with concentrated HCl. The `Cl_(2)` gas evolved was passed through excess of KI solution. The iodine gas evolved required 80ml of `(N)/(10)` hypo solution.   The precentage of `MnO_(2)` in pyrolusite will be : `[Mn=55]`