NEET Exam > NEET Videos > Chemistry Class 12 > Preparation of Alkyl Halides by Free Radical Halogenation
Preparation of Alkyl Halides by Free Radical Halogenation Video Lecture | Chemistry Class 12 - NEET
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FAQs on Preparation of Alkyl Halides by Free Radical Halogenation Video Lecture - Chemistry Class 12 - NEET
| 1. What is free radical halogenation? |  |
Ans. Free radical halogenation is a chemical reaction that involves the substitution of a hydrogen atom in an alkane with a halogen atom, resulting in the formation of an alkyl halide. This reaction occurs through a free radical mechanism, where halogen radicals (such as chlorine or bromine) abstract a hydrogen atom from an alkane, forming a new carbon-halogen bond.
| 2. How is the reaction of alkyl halide formation initiated? | |
Ans. The reaction of alkyl halide formation is initiated by the presence of a free radical initiator, such as heat or light. These initiators provide the energy needed to break the relatively weak halogen-halogen bond, generating halogen radicals that can then abstract hydrogen atoms from the alkane.
| 3. What are the conditions required for free radical halogenation to occur? | |
Ans. Free radical halogenation requires specific conditions to occur. These conditions include the presence of a halogen (such as chlorine or bromine), an alkane as the substrate, and a free radical initiator (such as heat or light). Additionally, the reaction is typically carried out under an inert atmosphere, such as nitrogen or argon, to prevent unwanted side reactions.
| 4. Are all alkyl halides prepared by free radical halogenation? | |
Ans. No, not all alkyl halides are prepared by free radical halogenation. While free radical halogenation is a common method for preparing alkyl halides, there are other methods available as well. Some alternative methods include nucleophilic substitution reactions and addition reactions. The choice of method depends on the specific alkyl halide desired and the starting materials available.
| 5. Can alkyl halides be prepared from any alkane using free radical halogenation? | |
Ans. Alkyl halides can be prepared from most alkanes using free radical halogenation. However, the reactivity of the alkane and the selectivity of the reaction can vary depending on the specific alkane structure. For example, primary and secondary alkyl carbons are more reactive towards free radical halogenation compared to tertiary carbons. Additionally, steric hindrance and other factors can influence the selectivity of the reaction, leading to the formation of multiple products.
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