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NEET CHEMISTRYAlcohols, Phenols and EthersEasy

Question

Which of the following is suitable to synthesize chlorobenzene?

A
B

Benzene, Cl2\text{Cl}_2, anhydrous FeCl3\text{FeCl}_3

C

Phenol, NaNO2\text{NaNO}_2, HCl\text{HCl}, CuCl\text{CuCl}

D

Step-by-Step Solution

Chlorobenzene is synthesized by the electrophilic substitution of benzene with chlorine in the presence of a Lewis acid catalyst such as anhydrous FeCl3\text{FeCl}_3 .

C6H6+Cl2→Anhyd. FeCl3C6H5Cl+HCl\text{C}_6\text{H}_6 + \text{Cl}_2 \xrightarrow{\text{Anhyd. FeCl}_3} \text{C}_6\text{H}_5\text{Cl} + \text{HCl}

Option 3 is incorrect because the Sandmeyer's reaction, which is also used to prepare chlorobenzene, requires aniline (not phenol) to react with NaNO2\text{NaNO}_2 and HCl\text{HCl} to form a benzene diazonium halide, which is subsequently treated with cuprous chloride (CuCl\text{CuCl}) .

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Alcohols, Phenols and Ethers. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYAlcohols, Phenols and Ethersfollowingsuitablesynthesizechlorobenzene

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When phenol is treated with CHCl₃ and NaOH, the product formed is:

A.Benzaldehyde
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A.Option 1
B.Option 2
C.Option 3
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A.Option 1
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