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GK QUESTION#3268

Which option gives the products and energy released in the complete combustion of ethanol, CH₃CH₂OH, in sufficient oxygen?

  1. AH₂O + heat
  2. BCO₂ + H₂O + heat and lightCorrect answer
  3. CCO₂ + H₂O + light
  4. DCO₂ + heat and light
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Answer

B. CO₂ + H₂O + heat and light

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Explanation

Complete combustion of ethanol in sufficient oxygen is C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O. The reaction releases energy as heat and, in a flame, light. Option B gives the complete listed combination of products and energy; oxygen-limited combustion can produce other products.

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