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Science (086) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [1] medium exam-ready
In the reaction ZnO + C → Zn + CO, carbon is: (A) Oxidised (B) Reduced (C) Neither oxidised nor reduced (D) Both oxidised and reduced
  1. A Oxidised
  2. B Reduced
  3. C Neither oxidised nor reduced
  4. D Both oxidised and reduced
Generated by claude-sonnet-4-6 · 2026-06-26 00:53 · grounding rag
Model Answer

(A) Oxidised

In ZnO + C → Zn + CO, carbon gains oxygen (from ZnO) to form CO. Gain of oxygen means oxidation. So carbon is oxidised.

Explanation

The key concept: oxidation = gain of oxygen; reduction = loss of oxygen. Here, ZnO loses oxygen (ZnO is reduced → Zn), and C gains that oxygen (C is oxidised → CO). Carbon acts as the reducing agent but itself gets oxidised — a common exam confusion point. Remember: the substance that gets oxidised is the reducing agent.

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.