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QJEEAdv78Chc29c: JEE Advanced 1978 Chemistry - Class 11 JEEAdv78Chc29c Solution: Igniting MnO 2 converts it quantitatively to Mn 3 O 4 . A…
Igniting MnO2 converts it quantitatively to Mn3O4. A sample of pyrolusite is of the following composition : MnO2 80%, SiO2 and other inert constituents 15%, rest being water. The sample is ignited in air to constant weight. What is the percentage of Mn in the ignited sample? [O = 16, Mn = 54.9]
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