Q. The product formed during Hell-Volhard-Zelinsky reaction is

 376  147 Aldehydes Ketones and Carboxylic Acids Report Error

Solution:

Carboxylic acids having an -hydrogen are halogenated at the -position on treatment with chlorine or bromine in the presence of small amount of red phosphorus to give -halocarboxylic acids. The reaction is known as Hell-Volhard-Zelinsky reaction.