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Last updated date: 26th Nov 2023
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MVSAT Dec 2023

Benzene hexachloride is
A. $ 1,2,3,4,5,6 $ -hexachlorocyclohexane
B. $ 1,1,1,6,6,6 $ -hexachlorocyclohexane
C. $ 1,6 - phenyl - 1,6 - chlorohexane $
D. $ 1,1 - phenyl - 6,6 - chlorohexane $

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Hint :Actually, it is know that the International Union of Pure and Applied Chemistry (IUPAC) nomenclature of organic chemistry is a method of naming organic chemical compounds that is recommended in chemical nomenclature (IUPAC). It's in the Journal of Organic Chemistry's Nomenclature (informally called the Blue Book).

Complete Step By Step Answer:
We evaluated all the options in the question and found that option A is the right answer as Benzene hexachloride is $ 1,2,3,4,5,6 $ -hexachlorocyclohexane.
Any of many stereoisomers of $ 1,2,3,4,5,6 $ -hexachlorocyclohexane produced by the light-induced addition of chlorine to benzene is known as benzene hexachloride (BHC). The insecticide lindane, or Gammexane, is one of these isomers.
As chlorine is added to benzene, it forms a mixture of stereoisomers of $ 1,2,3,4,5,6 $ -hexachlorocyclohexane. In certain solvents, the -isomer, which accounts for $ 20 - 25 $ percent of this mixture, is more soluble than the other isomers and can be isolated from them. BHC is more volatile than DDT and has a quicker but shorter duration of action on insects.
The insecticidal properties of benzene hexachloride were discovered in $ 1944 $ with the $ \gamma $ -isomer (gamma-isomer), which is $ 1000 $ times more toxic than all of the other diastereomers produced in the reaction. The orientations of the chlorine atoms with respect to the carbon ring are the structural variations between these individuals.
Aside from the problem of lindane pollution, there are also questions about the other isomers of HCH, namely alpha-HCH and beta-HCH, which are significantly more toxic than lindane, lack its insecticidal properties, and are lindane byproducts.
Lindane is known to build up in the food chain. Since animals, including humans, consume foods produced in lindane-contaminated soils, and fish and other aquatic organisms are exposed to lindane-contaminated waters, this happens. High levels of lindane can cause acute poisoning in fish and mammals, which is manifested by nervous system dysfunction.

Note :
In humans, chronic exposure may have a negative impact on liver function. Lindane is no longer allowed to be used indoors in smoke fumigators, and its use as an insecticide is prohibited in many countries. It is permissible to use lice-fighting lotions on the skin.