Q. Which of the following statements is true for ethane, ethene and acetylene?
A) Acetylene is the weakest acid and has the longest $C - H$ bond distance
B) Acetylene is the strongest acid and has the shortest $C - H$ bond distance
C) Ethane is the strongest acid and has the longest $C - H$ bond distance
D) Ethene is the strongest acid and has the shortest $C - H$ bond distance
Explanation
(b)
Acetylenichydrogens are acidic because sigma electron density of $C - H$ bond in acetylene is nearer to carbon, which has 50% $s$-character
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.