The Black,granular Material That Fills a Dry Cell in a Common

question 28

Multiple Choice

The black,granular material that fills a dry cell in a common flashlight (between the carbon rod and the zinc shell) is manganese(II) oxide,MnO₂.The oxidation number of manganese in MnO₂ is

• A)+2.
• B)-2.
• C)+4.
• D)-4.

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