Question
The group of an alcohol or the carboxylic acid can be replaced by using:
Hypochlorous acid
Chlorine
Hydrochloric acid
Phosphorous pentachloride
The hydroxyl group () of an alcohol or a carboxylic acid can be readily replaced by a chlorine atom () upon reaction with phosphorus halides such as phosphorus pentachloride (), phosphorus trichloride (), or thionyl chloride () .
For example, the reaction with alcohols is given by: .
Similarly, carboxylic acids react with to form acyl chlorides (). While concentrated hydrochloric acid () can replace the group of primary and secondary alcohols in the presence of a catalyst , it cannot replace the group of carboxylic acids. Therefore, phosphorous pentachloride is the correct general reagent for both.
This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Haloalkanes and Haloarenes. 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.
More Haloalkanes and Haloarenes Questions
In the given reaction the product P is:
Given below is a reaction sequence: $\text{CH}_3\text{CH}_2\text{Cl} \xrightarrow{\text{NaCN}} X \xrightarrow{\text{H}_2/\text{Ni}} Y \xrightarrow{\text{Acetic Anhydride}} Z$ The product '$Z$' in the above reaction is:
The correct order of increasing C-X bond reactivity toward nucleophiles among the following is: I. [Missing] II. [Missing] III. $(\text{CH}_3)_3\text{C-X}$ IV. $(\text{CH}_3)_2\text{CH-X}$
Which of the following methods is incorrect for the synthesis of alkenes?
The correct reaction among the following is:
The major product formed in the dehydrohalogenation reaction of 2-bromopentane is pent-2-ene. This product formation is based on:
A reaction among the following can generate isonitriles as a major product. (A) $\text{R-X} + \text{HCN} \rightarrow$ (B) $\text{R-X} + \text{AgCN} \rightarrow$ (C) $\text{R-X} + \text{KCN} \rightarrow$ (D) $\text{R-X} + \text{NaCN} \xrightarrow{\text{C}_2\text{H}_5\text{OH}/\text{H}_2\text{O}}$ Choose the most appropriate answer from the options given below:
Which of the following is suitable to synthesize chlorobenzene?
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