Question

The silver salt of a fatty acid on refluxing with an alkyl halide gives an:
A.Acid
B.Ester
C.Ether
D.Amine

Answer 1

Hint:We have to know that the salts of long-chain carboxylic acids are called fatty acids salts. Free fatty acids are less water-soluble than the sodium or potassium salts, and they participate as soap scum. We know that alkyl halides (or) haloalkanes are those compounds where one (or) more than one atom of hydrogen in alkane is replaced by halogen atoms such as chlorine, fluorine, iodine (or) bromine.

Complete answer:
We have to remember that a carboxylic acid consisting of a long aliphatic chain that is either saturated or unsaturated is called fatty acid. Most of the naturally occurring fatty acid comprises an unbranched chain of an even number of carbon atoms from four to twenty-eight. Fatty acids in any form of esters such as triglycerides, phospholipids and cholesteryl esters are major dietary sources of fuel for animals and are important structural components for cells.
We know that alkyl halides (or) haloalkanes are those compounds where one (or) more than one atom of hydrogen in alkane is replaced by halogen atoms such as chlorine, fluorine, iodine (or) bromine. Alkyl halides categorizes into several classes based on the number of halogen atoms located on the chain of carbon atoms. Alkyl halides could be divided as primary, secondary, or tertiary.
When silver salts of fatty acids are heated in alcoholic solution in the presence of alkyl halides esters are produced. We can write the general equation as,
$R'COOAg + XR \to R'COOR + AgX$
For example, silver acetate reacts with ethyl bromide to form ethyl acetate and silver bromide. We can write the chemical reaction for this reaction as,
$C{H_3}COOAg + {C_2}{H_2}Br \to C{H_3}COO{C_2}{H_5} + AgBr$
Therefore, the option (B) is correct.

Note:
We can list out some of the biological functions of fatty acids are given below,
-Signal-transduction pathways
-Cellular fuel sources
-The composition of hormones and lipids
-Modification of proteins
-Energy storage within adipose tissue in the form of triacylglycerol.