OnlineCBT
Chemistry · PYQ NEET UG 2017
हिन्दीWhich one is the CORRECT order of acidity?\n(A) \( \text{CH}\equiv\text{CH} > \text{CH}_2=\text{CH}_2 > \text{CH}_3-\text{CH}=\text{CH}_2 > \text{CH}_3-\text{C}\equiv\text{CH} > \text{CH}_3-\text{CH}_3 \)\n(B) \( \text{CH}\equiv\text{CH} > \text{CH}_3-\text{C}\equiv\text{CH} > \text{CH}_2=\text{CH}_2 > \text{CH}_3-\text{CH}_2 \)
Correct answer · Option 2
\( \text{CH}\equiv\text{CH} > \text{CH}_3-\text{C}\equiv\text{CH} > \text{CH}_2=\text{CH}_2 > \text{CH}_3-\text{CH}_2\text{CH}_3 \)
Explanation
Acidity depends on s-character of carbanion: sp (\( 50\% \) s) > \( sp^2 \) (\( 33\% \) s) > \( sp^3 \) (\( 25\% \) s). Thus \( \text{CH}\equiv\text{CH} > \text{CH}_3-\text{C}\equiv\text{CH} > \text{CH}_2=\text{CH}_2 > \text{CH}_3-\text{CH}_2\text{CH}_3 \).
