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Which of the following compounds would readily undergo addition reaction?

Chemistry
WAEC 2025

Which of the following compounds would readily undergo addition reaction?

  • A. ethane
  • B. butene
  • C. ethanol
  • D. benzene
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Correct Answer: Option B
Explanation

Addition reactions typically occur in unsaturated hydrocarbons, which contain at least one double or triple bond between carbon atoms. 

As an alkene, butene contains a carbon-to-carbon double bond (C=C). This double bond can break (specifically the pi bond), allowing new atoms or groups of atoms to attach to the carbon atoms, resulting in a single saturated product. Common examples include hydrogenation (adding H\(_2\)) and halogenation (adding Cl\(_2\) or Br\(_2\))


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