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In the reaction CrO + H2 → H2O + Cr, the element being reduced is:
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In the reaction CrO + H2 → H2O + Cr, the element being reduced is:

User Yeahia Md Arif
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The element being reduced is chromium (Cr). In this reaction, chromium is going from a positive oxidation state in CrO to a zero oxidation state in Cr. Reduction is the gain of electrons, and in this case, chromium is gaining electrons.
User Radovix
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