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MDCAT Chemistry QUESTION #4372
Question 1
What is the general requirement for free radical substitution reaction of ethane and halogen?
  • Low pressure
  • Low temperature
  • High pressure
  • Heat and UV light✔️
Correct Answer Explanation
Free radical substitution (e.g., $C_2H_6 + Cl_2 \xrightarrow{h\nu} C_2H_5Cl + HCl$) requires initiation by UV light or heat to generate free radicals by homolytic cleavage of the halogen molecule.