The correct order for acid strength of compounds :
CH ≡ CH, CH3 – C ≡ CH and CH2 = CH2 is as follows :
(1) CH3 – C ≡ CH > CH2 = CH2 > HC ≡ CH
(2) CH ≡ CH > CH2 = CH2 > CH3 – C ≡ CH
(3) CH3 – C ≡ CH > CH ≡ CH > CH2 = CH2
(4) HC ≡ CH > CH3 – C ≡ CH > CH2 = CH2
