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🧪 Chemistry  ·  Redox Reactions  ·  NEET & JEE

What is the oxidation state of carbon in glucose (C<sub>6</sub>H<sub>12</sub>O<sub>6</sub>)?

Answer: 0.

  • A 0
  • B +1
  • C -2
  • D +4

Correct answer: A. 0

Explanation: Average oxidation state of C in C₆H₁₂O₆: C₆H₁₂O₆ = 0 charge. 6C + 12(+1) + 6(-2) = 0. 6C = 0. Average oxidation state of C = 0.

Electron Transfer: Zn + Cu²⁺ → Zn²⁺ + CuZnloses 2e⁻OXIDISED (Zn → Zn²⁺)2e⁻Cu²⁺gains 2e⁻REDUCED (Cu²⁺ → Cu)Zn = reducing agentCu²⁺ = oxidising agent

Electron transfer in a redox reaction: zinc loses electrons (oxidised, acts as reducing agent) and copper(II) ions gain those same electrons (reduced, acts as oxidising agent).

Concept context

Master electron transfer in chemistry: assign oxidation states, balance half-reactions, identify oxidising and reducing agents, and connect redox to everyday reactions.

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