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(B) Raghav's method is correct because thionyl chloride $(SOCl_2)$ in the presence of pyridine (Darzen's process) effectively converts alcohols into a

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Only Raghav's method is correct

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(B) Raghav's method is correct because thionyl chloride $(SOCl_2)$ in the presence of pyridine (Darzen's process) effectively converts alcohols into alkyl chlorides.Kaushal's method is incorrect because $KCl$ is not a halogenating agent for alcohols.Preeti's method is incorrect because the reaction of an alkene with chlorine water $(Cl_2 + H_2O)$ produces a chlorohydrin $(CH_3-CH(OH)-CH_2Cl)$ rather than an alkyl halide.

Prof. Sandy Gilbert asked his students to prepare $2$-chloropropane by different methods:
Kaushal's method: $CH_3-CH(OH)-CH_3 \xrightarrow{KCl}$
Preeti's method: $CH_3-CH=CH_2 \xrightarrow{Cl_2 + H_2O}$
Raghav's method: $CH_3-CH(OH)-CH_3 \xrightarrow[Pyridine]{SOCl_2}$

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Prof. Sandy Gilbert asked his students to prepare $2$-chloropropane by different methods:Kaushal's method: $CH_3-CH(OH)-CH_3 \xrightarrow{KCl}$Preeti's method: $CH_3-CH=CH_2 \xrightarrow{Cl_2 + H_2O}$Raghav's method: $CH_3-CH(OH)-CH_3 \xrightarrow[Pyridine]{SOCl_2}$