What Is the Oxidation Number Change for the Manganese Atom

question 53

Multiple Choice

What is the oxidation number change for the manganese atom in the following unbalanced reduction half-reaction:
Mn O₄^- (aq) + H⁺(aq) → Mn²⁺(aq) + H₂O(l)

• A)-7
• B)-5
• C)+5
• D)+7

---

Definitions:

Honesty Test

An assessment used by employers to evaluate a potential employee's likelihood to be honest and trustworthy in the workplace.

Performance Test

An assessment designed to measure the effectiveness, reliability, or quality of a product or service.

Transcribe

The act of converting spoken words into written or printed form, often used in legal, medical, and media contexts.

Typing

The process of inputting text by pressing keys on a typewriter, computer keyboard, or touch screen.