Q. Which one of the following pairs gives effervescence with aq. $NaHCO_{3}$? $CH_{3}COCl\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ CH_{3}COCH_{3}$ (I) (II) $CH_{3}COOCH_{3}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ CH_{3}COOCOCH_{3}$ (III) (IV)
A) I and II
B) I and IV
C) II and III
D) I and III
Explanation
(b)
Due to strong negative inductive effect shown by –Cl and $–OCOCH_{3}$ group, acid chloride and acid anhydride are highly reactive among acid derivatives. They react independently with water even in the absence of catalyst to give carboxylic acid.
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Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.