JEE MainChemistryHaloalkanes and Haloarenes
Consider the following statements regarding the preparation and reactions of haloalkanes and haloarenes: Statement I: Alkyl iodides are often prepared by the reaction of alkyl chlorides with NaI in dry acetone. Statement II: Replacement of the diazonium group by -Cl or -Br using Cu powder and HCl / HBr is called the Sandmeyer reaction. Statement III: A mixture of an alkyl halide and aryl halide gives an alkylarene wh
Options
- AI, II, III and IV
- BI and III only
- CI and IV only
- DII and III only
Correct answer
B. I and III only
Step-by-step solution
Statement I describes the Finkelstein reaction, which is a correct method for preparing alkyl iodides. Statement II describes the Gattermann reaction. The Sandmeyer reaction uses cuprous halides ( Cu ₂ Cl ₂ or Cu ₂ Br ₂ ), not copper powder. Thus, Statement II is incorrect. Statement III correctly describes the Wurtz-Fittig reaction, which couples an alkyl halide with an aryl halide. Statement IV describes the Fittig reaction, not the Wurtz-Fittig reaction. The Fittig reaction involves the coupling of two aryl hali