Ncert Solutions Chemistry Class 12th

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Phenol will not react with HCl in the presence of ZnCl₂. This is owing to the presence of partial double bond properties between the benzene ring and O, which will result in resonance between the benzene ring and the OH -  group. As a result, no aryl halide will be made.

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Nucleophilic substitutions occur when haloalkanes react with aqueous KOH. The tertiary halide 2-Bromo-2-methylpropane will react with aq. KOH the easiest of the compounds because the initial step involves cleavage of the alkyl and halide groups, resulting in the production of the extremely stable carbocation.

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Methylenecyclohexane and 1-methylcyclohex-1-ene are two chemicals that can produce 1-chloro-1-methylcyclohexane.

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The alkane C₅H₁₂ is a hydrocarbon with a molecular mass of 72gmol^?1. On photo-chlorination, the tert-isomer of pentane yields a single monochloro derivative and two dichloro derivatives. The following is the structure of the alkane and its chloride derivatives.

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The IUPAC name for this compound is 1-Bromo-2,2-dimethylpropane

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Because both methyl groups and chlorine atoms are symmetrically positioned at para-positions in compound (II), these molecules fit better in the crystal lattice than other isomers, and hence have the greatest melting point.

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The addition reaction of the alkene produces two products, as indicated below.

CH₃−CH₂−CH=CH−CH₃ + HCl→ A + B

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When an arene is treated with Cl₂ in the presence of FeCl₃, the electrophilic addition reaction chlorinates the arene to produce aryl chloride. As a result, the chemical provided is C₆H₅-CH₃, often known as toluene. o-chlorotoluene and p-chlorotoluene are the results of electrophilic substitution chlorination.

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

(i) 1-Bromobut-2-ene: It is a primary halide.

(ii) 4-Bromopent-2-ene: Here Bromine is attached to the secondary carbon. Hence, it is a secondary halide.

(iii) 2-Bromo-2-methylpropane: Here Bromine is attached to the tertiary carbon. Hence, it is a tertiary halide.