Haloalkanes And Haloarenes - Organic Chemistry - Chemistry Previous Year Questions

Benzene reacts with chlorine in sunlight to give a final product

An alkyl halide reacts with alcoholic ammonia in a sealed tube, the product formed will be

The reaction \(\mathrm{ArN_2^ + C{l^ - }\buildrel {Cu/HCl} \over \longrightarrow ArCl + {N_2} + CuCl}\) is called as

Alkyl halides undergoing S_N2 reaction do inverse

The reactions taking place with \(\mathrm{2- Phenyl-2-bromopropane}\) as the starting material is shown below. Identify [A] and [B] formed in the reaction.

$$\mathrm{C}_6 \mathrm{H}_5-\mathrm{C}\left(\mathrm{CH}_3\right)_2^{-} \mathrm{Br} \xrightarrow[\Delta]{\text { KOH Alcoholic }}[\mathrm{A}]$$

$$[\mathrm{A}]+\mathrm{HBr} \xrightarrow{\left(\mathrm{C}_6 \mathrm{H}_5 \mathrm{CO})_2 \mathrm{O}\right.}[\mathrm{B}]$$

Identify the compounds A, B, C and D.

$$\text { 1,2,2,2-tetrachloroethane } \xrightarrow[\Delta]{\mathrm{Zn}}[\mathrm{A}]$$

[A] \(\xrightarrow[675 \mathrm{~K}]{\text { Fe tube }}\) [B] \(\xrightarrow[\text { Conc. } \mathrm{H}_2 \mathrm{SO}_4]{\text { Conc. } \mathrm{HNO}_3}\) [C] \(\xrightarrow[\text { Anhydrous } \mathrm{AlCl}_3]{\mathrm{Cl} /}\) [D]

Which one of the following will undergo Nucleophilic substitution, by \(\mathrm{S}_{\mathrm{N}}{ }^1\) mechanism, fastest?

Choose the incorrect statement from the following.

Arrange the following in the order of increasing reactivity towards \(\mathrm{SN}_{\mathrm{2}}\) reactions.

$$\begin{array}{ll} \[\left(\mathrm{CH}_3\right)_3 \mathrm{CCH}_2 \mathrm{Br}(\mathrm{P}) ; & \\\mathrm{CH}_3\left(\mathrm{CH}_2\right)_3 \mathrm{Br}(\mathrm{Q}) ; &\\\] \[\mathrm{CH}_3 \mathrm{CH}_2-\mathrm{CH}\left(\mathrm{CH}_3\right)-\mathrm{CH}_2 \mathrm{Br}(\mathrm{R}) ; & \\\left(\mathrm{CH}_3\right)_2 \mathrm{CHCH}_2 \mathrm{CH}_2 \mathrm{Br}(\mathrm{S})\] \end{array}$$

Consider the following reaction

$$(\mathrm{CH}_3)_2 \mathrm{CHCH}_2 \mathrm{Br}+(\mathrm{CH}_3)_3 \mathrm{CCH}_2 \mathrm{Br} \xrightarrow[\Delta]{\mathrm{Na} \text { /dry ether }} \mathrm{X}+\mathrm{Y}+\mathrm{Z}$$

Identify the product which is not formed?

Arrange the following compounds in the decreasing order of reactivity towards electrophilic substitution reaction.

(I) Chlorobenzene

(II) Nitrobenzene

(III) Benzene

(IV) Isopropylbenzene

The major product obtained in the following reaction is :

Arrange the following compounds in the increasing order of their reactivity when each of them is reacted with chloroethane / anhydrous AlCl\(_3\).

Match the names of reactions given in Column I with the appropriate reactions given in Column II.

Arrange the compounds \(\mathrm{A}, \mathrm{B}, \mathrm{C}\) and \(\mathrm{D}\) in the increasing order of their reactivity towards \(\mathrm{S_N}1\) reaction.

$$\begin{aligned} & \mathrm{A}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Cl} \\ & \mathrm{B}=\mathrm{C}_6 \mathrm{H}_5 \mathrm{Cl} \\ & \mathrm{C}=\mathrm{CH}_2=\mathrm{CH}-\mathrm{Cl} \\ & \mathrm{D}=\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{Cl} \end{aligned}$$

Identify the final product formed when Toluene undergoes a series of reactions with reagents given in the order:

(i) \(\mathrm{Cl}_2\) / Sunlight

(ii) \(\mathrm{H}_2 \mathrm{O} / 373 \mathrm{~K}\)

(iii) Acetophenone / \(\mathrm{OH^-}\) at \(293 \mathrm{~K}\)

Identify the products C, D and F formed in the following sets of reactions.

Which one of the following compounds when reacted with \(\mathrm{NaOH}\) (aq) undergoes Substitution Nucleophilic Bimolecular reaction with retention of configuration?

Identify the reagents to be used to complete the given reaction.