Haloalkanes And Haloarenes

Aryl and vinyl halide's are not hydrolysed by alcoholic silver nitrate solution. Benzyl chloride gives a 'white ppt. while ethyl iodide gives yellow ppt with alcoholic silver nitrate solution.

reaction is two steps reaction in which. carbocation is . formed as an intermediate in step I (rate determining step). Greater the stability of carbocation, greater will be its ease of formation from alkyl halide and faster will be the rate' of reaction. Thus, the order of reactivity of haloalkanes towards reaction is Tertiary halide > Secondary halide > Primary halide.

Alkyl halides are hydrolysed to corresponding alcohols by boiling with aqueous alkali solution . This is nucleophilic substitution reaction in. which the attacking nucleophile is .

Freons are chlorofluorocarbons introduced into the atmosphere from aerosol sprays and refrigerating equipments. They have a very long life time and when they reach stratosphere, they undergo photochemical decomposition and destroy ozone by the following sequence of reactions :

The given reaction is an example of the Sandmeyer reaction, a reaction in which aryl diazonium salts undergo substitution with halides (such as chloride or bromide) in the presence of copper and hydrochloric acid. This is a classic method for preparing aryl halides from aryl diazonium salts. Thus, the correct answer is option (A).

In this reaction, phenol (C H O) reacts with ammonium hydroxide (NH OH). The addition of sulfuric acid (H SO ) to the reaction mixture leads to the formation of a product where the hydroxyl group from phenol remains intact. This is because the sulfuric acid does not affect the formation of the phenol ring. The final product B is phenol (C H OH). Thus, the correct answer is Option (B).

The Wurtz reaction involves the coupling of two alkyl halides in the presence of sodium metal, leading to the formation of a higher alkane: In the case of methane (CH ), since there is no carbon-carbon bond available in a single methyl group (CH ), methane cannot be formed through the Wurtz reaction. Thus, the product that is not possible is Methane.

In an reaction, the nucleophile attacks the electrophilic carbon from the side opposite the leaving group in a single concerted step. This results in inversion of configuration (Walden inversion), typical of mechanisms.