CUET Preparation Today
Case: Read the passage and answer the questions There are several methods to prepare halo alkanes and haloarenes. One of the methods is to prepare from alcohol. The hydroxyl group of an alcohol is replaced by halogen on reaction with concentrated halogen acids, phosphorus halides or thionyl chloride. The halo alkanes are prepared by treating alkane with a limited amount of halogen in presence of halogen carrier and sunlight or heat. Adding hydrogen halide to alkene also results in the formation of halo alkanes. Haloarenes are prepared from hydrocarbons by electrophilic substitution and amines by Sandmeyer’s reaction. |
| Alkyl iodides are often prepared by the reaction of alkyl chlorides/bromides with NaI in dry acetone. What is this reaction called? |
Finkelstein reaction. Wurtz reaction Sandmayers reaction None of these |
| Finkelstein reaction. |
| Alkyl iodides are often prepared by the reaction of alkyl chlorides/bromides with NaI in dry acetone. This reaction is known as Finkelstein reaction. |
