Answer: Addition.
- A Substitution
- B Addition
- C Condensation
- D Elimination
Correct answer: B. Addition
Explanation: Alkenes mainly undergo addition reactions because of the reactive double bond.
Going from a single to a triple bond between carbons increases the s-character of hybridisation (sp³→sp²→sp), shortening the bond and locking the geometry, while increasing π-bond reactivity (alkenes and alkynes readily undergo addition reactions that alkanes don't).
Concept context
The simplest organic compounds made only of carbon and hydrogen. Covers alkanes, alkenes, alkynes, and aromatic compounds like benzene. Learn preparation methods, key reactions, and physical properties.