Which is the most active form of BHC?
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Which is the most active form of BHC?
Common forms are: alpha-hexachlorocyclohexane, α-HCH, or α-BHC (CAS RN: 319-84-6 ), the optically active isomer. beta-hexachlorocyclohexane, β-HCH, or β-BHC (CAS RN: 319-85-7 ) gamma-hexachlorocyclohexane, γ-HCH, γ-BHC, or lindane (CAS RN: 58-89-9 ), the most insecticidal isomer.
What elements are in the pesticide Lindane?
It has been produced commercially since 1949. Technical-grade HCH is synthesized from benzene and chlorine in the presence of ultra-violet light and comprises 65-70\% alpha-HCH, 7-10\% beta-HCH, 14-15\% lindane (gamma-HCH), approximately 7\% delta-HCH, 1-2\% epsilon-HCH, and 1-2\% other components.
What is the structure of lindane?
C6H6Cl6Lindane / Formula
How do you make Gammaxene?
Preparation of Benzene hexachloride
- Chlorine combines with benzene, in the presence of sunlight and in the absence of oxygen as well as substitution catalysts, to form hexachlorocyclohexane.
- Lindane can be prepared from chlorine and benzene by photochlorination.
How is BHC obtained?
benzene hexachloride (BHC), any of several stereoisomers of 1,2,3,4,5,6-hexachlorocyclohexane formed by the light-induced addition of chlorine to benzene. One of these isomers is an insecticide called lindane, or Gammexane. Lindane has been shown to accumulate in the food chain.
What is BHC in chemistry class 12?
The full name of B.H.C. is benzene hexachloride or 1,2,3,4,5,6-hexachlorocyclohexane. It is obtained by the addition of chlorine to benzene in presence of light. For this reaction to occur, oxygen and substitutional catalysts should be absent.
What compounds manufactured from benzene are used in insecticides?
benzene hexachloride (BHC), any of several stereoisomers of 1,2,3,4,5,6-hexachlorocyclohexane formed by the light-induced addition of chlorine to benzene. One of these isomers is an insecticide called lindane, or Gammexane.
Who is invented DDT?
DDT has humble origins for a chemical that would eventually reach much of the world. First discovered in 1873 by a German chemistry student named Othmar Zeidler, the compound did not receive serious attention until a 37-year-old chemist named Paul Herman Muller synthesized it again in 1936.
Why is lindane banned?
In 2002, California banned pharmaceutical use of lindane because of concerns about water quality, as lindane treatment for head lice and scabies was found to be a significant factor adversely affecting wastewater quality.
Why is Gammexane called 666?
Reason: BHC is called gammexene or 666. (A) Benzene reacts with CI2 in presence of sunlight to form benzen hexachloride (BHC).
How is Gammexane prepared?
What is BHC and its preparation?
It is prepared by chlorination of benzene in presence of sunlight. The mixture of stereoisomeric hexachlorides is an active component in BHC is γ isomer, called gammaxene or lindane. Uses. BHC is an important agricultural pesticide mainly used for exterminating white ants, leaf hopper, termite etc.