Question

In reaction given below, what is the product formed?
 \[{C_6}{H_6}\, + C{l_2}\,\,(UV~light) \to \;Product.\]
A. $C{C_3}CHO$
B. ${C_6}{H_6}C{l_6}$
C. ${C_6}{H_{12}}C{l_6}$
D. ${C_6}{H_9}C{l_2}$

Answer 1

Hint: In the given reaction chlorination of benzene is taking place in the presence of sunlight. This indicates that the mechanism will have free radical formation and addition of chlorine atoms to the benzene.

Complete step-by-step answer:Chlorination refers to any reaction or procedure in which a molecule is introduced to chlorine (and no other elements). For instance, chlorinating an alkene by adding \[C{l_2}\] electrolytically.

Despite not being flammable, several ordinary chemicals including chlorine can react explosively or produce explosive compounds (including acetylene, ether, turpentine, ammonia, natural gas, hydrogen, and finely divided metals).

Six chlorine molecules are added to benzene to produce benzene hexachloride when benzene is subjected to chlorine treatment in the presence of strong sunshine or UV light.
In the given reaction benzene is made to react with chlorine, i.e., chlorination of benzene is taking place in presence of UV light and we have to tell the product that will be obtained in the end. During chlorination of benzene, all the double bonds break and get converted to single bonds. The bonds so broken form a new bond with the chlorine atoms from \[C{l_2}\] . The product so formed is benzene hexachloride having the chemical formula, \[{C_6}{H_6}C{l_6}\] .

Option ‘B’ is correct

Note:When benzene and chlorine or bromine interact in the presence of a catalyst, one of the hydrogen atoms on the ring is replaced by an atom of chlorine or bromine. Room temperature is where the reactions take place. Iron or aluminium chloride serves as the catalyst when reacting benzene with bromine, or aluminium bromide otherwise.