What is the difference between substitution reaction and addition reaction?
Substitution swaps one atom/group for another (alkanes, benzene); addition breaks a multiple bond to add atoms across it (alkenes, alkynes).
Substitution swaps one atom/group for another (alkanes, benzene); addition breaks a multiple bond to add atoms across it (alkenes, alkynes). A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.
Key point
substitution reaction vs addition reaction
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