Base strength of iii ii i H CCH , H C CHand H C C is in the order of (AIPMT 2008)

2 2 3 3 2 2 3 3 sp sp sp sp sp sp Acidic character H C C H CH CH CH CH Conjugate base of the given acid: 2 2 3 Basic character C C H CH CH CH CH Conjugate base of stronger acid is weaker and vice- versa.