Question

When acetyl chloride is heated with Na salt of carboxylic acid, the product is an :
A. Ester
B. Anhydride
C. Alkene
D. Aldehyde

Answer 1

Hint: Nucleophilic substitution reactions are those reactions in which substitution is brought about by a nucleophile. These reactions are denoted by SN (S stands for substitution and N for nucleophile).

Complete step by step solution:
When acetyl chloride is heated with Na salt of carboxylic acid, the product is an acetic anhydride (which is an anhydride).
The following reaction takes place:

Hence, the correct option is B.
> Electrophiles and Nucleophiles are atoms, bonds, or (small or small parts of) compounds that are involved in chemical reactions.
> Electrophile may be defined as a species which are electron lovers. Such species are electron deficient in nature. It may be neutral or +ve charged.
> The nucleophile may be defined as a species, which is electron-rich in nature. Such species are neutral or –ve in charge.
> Stabilization of the negative charge on the acyl ion. The higher the stabilization through resonance, the lower will be the electrophilic nature and hence its reactivity.
> The lower the partial positive charge on the carbonyl atom, the lower will be its electrophilicity and hence reactivity.
> Nucleophilic substitution reaction is the reaction in which the nucleophile substitutes the electrophile.

Note: The possibility to make a mistake is that you may choose option C. But when acetyl chloride is heated, an anhydride is formed not an alkene.