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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
A carbon compound on reaction with alkaline potassium permanganate gets oxidised to form ethanoic acid. The original compound is:
  1. A Methanol
  2. B Ethanol
  3. C Propanol
  4. D Butanol
Generated by claude-sonnet-4-6 · 2026-06-26 01:06 · grounding rag
Model Answer

Option B: Ethanol

Ethanol (C₂H₅OH) on oxidation with alkaline potassium permanganate forms ethanoic acid (CH₃COOH).

Source: Oxidation, Chapter 4, Section 4.3.2

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Explanation

The key is matching the product (ethanoic acid, a 2-carbon compound) to its alcohol precursor. Ethanol is also the 2-carbon alcohol, so oxidation preserves the carbon chain and converts –OH to –COOH. The passage explicitly uses ethanol in Activity 4.5 to demonstrate this oxidation. Other options (methanol = 1C, propanol = 3C, butanol = 4C) would not yield ethanoic acid.

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