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Answered

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An element is reduced while another element is oxidized. What is this? 1. Acid-base 2. Redox 3. Precipitation 4. Combustion

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Answer:

2. Redox

Explanation:

A redox reaction is that in which an element is reduced while another element is oxidized. For example, let's consider the following redox reaction.

Fe + S ⇒ FeS

Fe is oxidized because it loses electrons to form Fe²⁺, while its oxidation number increases from 0 to 2+.

S is reduced because it gains electrons to form S²⁻, while its oxidation number decreases from 0 to 2-.

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