Answer: sp hybridised carbon has high s-character.
- A The pi bond delocalises the negative charge onto the adjacent carbon
- B sp hybridised carbon has high s-character
- C Resonance stabilises the resulting carbanion across the triple bond
- D The electron-withdrawing inductive effect of the second carbon
Correct answer: B. sp hybridised carbon has high s-character
Explanation: sp hybridised carbon holds electrons more tightly due to high s-character, making the C-H bond more polar and acidic.
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.