Haloalkanes and Haloarenes

This is a matching answer type question as classified in NCERT Exemplar

In the presence of Na metal in dry ether, an alkyl halide and an aryl halide combine to create alkyl arene in the Wurtz-Fittig reaction.

The Fittig reaction, which involves a coupling reaction between two aryl halides in dry ether in the presence of Na metal, yielding diaryl compounds, is the second reaction.

The Sandmeyer reaction produces aryl halides from primary amines by converting them to diazonium salts and treating them with cuprous bromide.

The Finkelstein reaction, which produces alkyl iodides by reacting alkyl chlorides or bromides with NaI in dry acetone, is the fourth process.

Correct Answer: (i) →  (b) (ii) →  (a) (iii) →  (d) (iv) →  (c)

This is a matching answer type question as classified in NCERT Exemplar

The first reaction is an electrophilic substitution process in which Cl⁺  from the Cl₂ and FeCl₃ combination attacks and substitutes the benzene ring.

Following Markownikoff's rule, the second reaction is an electrophilic addition reaction in which HBr is added across the double bond.

The third reaction is a nucleophilic substitution process that uses the S_N¹ mechanism to replace the -I group with -OH.

The nucleophilic aromatic substitution process, in which the -Cl group is replaced by -OH, is the fourth reaction.The fifth reaction is a dehydrohalogenation reaction, in which the alkyl halide is eliminated by Saytzeff.

Correct Answer: (i) →  (b) (ii) →  (d) (iii) →  (e) (iv) →  (a) (v) →  (c)

This is a matching answer type question as classified in NCERT Exemplar

Because it includes a halogen atom bound to an sp³ hybridised carbon atom, which is subsequently linked to additional alkyl groups, the first molecule is an alkyl halide.

An allyl halide is a compound in which the halogen atom is linked to a carbon atom that is bound to an sp³ hybridised carbon atom that is attached to a carbon-carbon double bond.

The third molecule is an aryl halide, which is a chemical in which the halogen atom is sp² hybridised with an aromatic ring carbon atom.

In a carbon-carbon double bond, the halogen atom is linked to a sp² hybridised carbon atom in the fourth molecule, a vinyl halide.

Correct Answer: (i) →  (b) (ii) →  (d) (iii) →  (a) (iv) →  (c)

This is a matching answer type question as classified in NCERT Exemplar

Racemization is the process of converting enantiomers into a racemic mixture, which is a mixture comprising two optically active enantiomers in equal quantities, from the results of the S_N¹ reaction. Chemical fire extinguishers are chlorobromocarbons.

Bromination of alkenes produces vic-dibromides, which are formed when halogen atoms of the same kind are linked to nearby carbon atoms of the molecule. Alkylidene dihalides, sometimes called gem-dihalides, are dihalides that have two halogen atoms bonded to the same carbon atom. The Saytzeff rule governs the removal of HX from alkyl halides: “In dehydrohalogenation processes, the desired product is that alkene with the greatest number of alkyl groups linked to the doubly bound carbon atoms.”

Correct Answer: (i) →  (c) (ii) →  (e) (iii) →  (a) (iv) →  (b) (v) →  (d)