Diazonium Replacement
Replacement of diazonium with –OH occurs by heating aqueous solution yielding:
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More nitrogen organics Practice Questions
Diazotization of aniline performed at low temperature (~0–5°C) because:
Diazotization of aniline performed at low temperature (~0–5°C) because:
Primary aliphatic amine treated with nitrous acid evolves:
Primary aliphatic amine treated with nitrous acid evolves:
Amides are far less basic than amines because:
Amides are far less basic than amines because:
Hofmann bromamide reaction converts an amide to:
Hofmann bromamide reaction converts an amide to:
Formation of nitrosyl derivative (green coloration) with secondary amine indicates:
Formation of nitrosyl derivative (green coloration) with secondary amine indicates:
In Hinsberg test, secondary amine gives product that is:
In Hinsberg test, secondary amine gives product that is:
Treatment of benzenediazonium chloride with CuCN (Sandmeyer) yields:
Treatment of benzenediazonium chloride with CuCN (Sandmeyer) yields:
Gabriel phthalimide synthesis is used to prepare:
Gabriel phthalimide synthesis is used to prepare:
Aniline is less basic than methylamine due to:
Aniline is less basic than methylamine due to:
Reduction of nitrobenzene with Sn/HCl gives initially:
Reduction of nitrobenzene with Sn/HCl gives initially:
Diazonium salts couple with phenols in alkaline solution to form:
Diazonium salts couple with phenols in alkaline solution to form:
Carbylamine test requires chloroform and alcoholic KOH; characteristic product is:
Carbylamine test requires chloroform and alcoholic KOH; characteristic product is:
About This Question
- Subject
- chemistry
- Chapter
- nitrogen organics
- Topic
- diazonium replacement
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Phenol
- Reactant: A benzene diazonium salt (C6H5N2+Cl−).
- Conditions: Simply warming the aqueous solution of the diazonium salt to about 50–100∘C.
- Chemical Change: The N2 group departs as a gas, and the vacant position is attacked by a water molecule acting as a nucleophile.
- Mechanism: C6H5N2+Cl−+H2OΔC6H5OH+N2↑+HCl.
- Result: Phenol is produced. This is a very efficient way to convert aniline (via diazonium) into phenol.
This easy difficulty chemistry question is from the chapter nitrogen organics, covering the topic of diazonium replacement. It appeared in the 2025 exam.
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