Propanoyl chloride is a member of?

Alkyl halides

Acid amides

Acid anhydrides

Acid halides

Propanoyl chloride is an acid chloride, which is a type of acid halide.

Acid halides are characterized by a carbonyl group (C=O) bonded to a halogen atom (like chlorine).

The general formula for an acid halide is RCO-X, where R is an alkyl group and X is a halogen.