Explain the concept of Exchange Electron - QS Study
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The idea of exchanging electron, x2 (g) + 3y2 (g) → 2xy3

This reaction is known as oxidation reduction reaction,

The actual reaction,

N2 (g) + 3H2 (g) ↔ 2NH3

0          0          ↔ – 3 + 1

The oxidation number of H atom 0 → +1. So the oxidation number increases. The oxidation number of N atom 0 → – 3. So the oxidation number decreases. H2 releases 1 electron and N2 receive 3 electron. To equal the oxidation number H2 multiply by 3. In the reaction, oxidation -reduction occurs.