MnO_(2) is the most important oxide of manganese , MnO_(2) occurs natually as the black coloured mineral pyrolusite. It is an oxidising agent, and decomposes to Mn_(3)O_(4) on heating to 530^(@)C. It is used in the preparation of potassium permanaganate and in the productioon of Cl_(2) gas. Over half million tonnes per year of MnO_(2) is used in dry batteries. Q.MnO_(2) dissolves in concentrated HCl to form:

MnO_(2) is the most important oxide of manganese , MnO_(2) occurs natu

1.	MnO_(2) is the most important oxide of manganese , MnO_(2) occurs natually as the black coloured mineral pyrolusite. It is an oxidising agent, and decomposes to Mn_(3)O_(4) on heating to 530^(@)C. It is used in the preparation of potassium permanaganate and in the productioon of Cl_(2) gas. Over half million tonnes per year of MnO_(2) is used in dry batteries. Q.MnO_(2) dissolves in concentrated HCl to form:
Answer» `Mn^(4+)` ion and `Cl_(2)` `Mn^(2+)` ion and `Cl_(2)` `[MnCl_(4)]^(2-) and Cl_(2)` only `[MnCl_(4)]^(2-)` Answer :B