Question

More acidic than ethanol is

• A. $CH _{3} CH _{2} CH _{2} CH _{2} CH _{2} CH _{2} CH _{2} CH _{3}$
• B. $CH _{3} CO _{2} CH _{2} CH _{3}$
• C. $CH _{3} COCH _{2} COCH _{3}$
• D. $CH _{3} COCH _{3}$

Answer 1

Answer: (C)

Pentane-$2, 4$-dione is more acidic than ethanol, because it is an active methylene compound and after the emission of proton, the anion is resonance stabilized.
$CH_3 - \overset{\underset{||}{O}}{C} - CH = \overset{\underset{|}{O^-}}{C} - CH_3 $