A sample of pyrolusite weighing 0.5 g is distilled with conc. HCI. The – InterviewSolution

1.	A sample of pyrolusite weighing 0.5 g is distilled with conc. HCI. The evolved CI_2 when passed through a solution of KI liberates sufficient I_2 to react with 125 ml of N//12.5 hypo solution (Na_2 S_2 O_3. 5 H_2 O). The percentage of MnO_2 in the sample of pyrolusite is:
Answer» 0.87 `43.5%` `72.8%` `22.1%` ANSWER :A

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