99 Percentile Qs Bank for JEE MainChemistryGeneral Organic Chemistry
The correct order of acidity of the following compounds is (I) CH 3 - C ≡ CH (II) F 3 C - C ≡ CH (III) CH 3 C ≡ CCH 3 (IV) CH 3 CH = CHCH 3
Options
- AI > II > III > IV
- BI > III > II > IV
- CII > III > I > IV
- DII > I > III > IV
Correct answer
D. II > I > III > IV
Step-by-step solution
The acidity of unsaturated compounds can be best described by observing the substituted group. The compounds containing the substituted group having strong - I effect or week + I will be more acidic than the compounds containing the substituted group having week - I effect or strong + I effect. This is in accordance with reactivity series of inductive effect. So, the order of acidity in the following group of compounds will be: II > I > III > IV