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Diazonium salts: preparation and synthetic uses

36 questions on Diazonium salts: preparation and synthetic uses from the Amines and Aromatic Nitrogen Compounds chapter: 7 NEET level, 14 JEE Main, 15 JEE Advanced. Each one opens with its answer and solution.

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Warming an aqueous solution of benzenediazonium chloride gives mainly NEET level
Which reagent converts benzenediazonium chloride into benzene? NEET level
Benzenediazonium chloride is converted into iodobenzene simply by treatment with NEET level
Aniline is diazotised with NaNO2 and dil. HCl at 273-278 K rather than at about 330 K mainly because NEET level
Benzenediazonium chloride is treated with HBF4 and the precipitate is filtered, dried and heated. The products are JEE Main level
Aniline is treated successively with (i) NaNO2 / dil. HCl at 273-278 K, (ii) CuCN/KCN, (iii) LiAlH4 in dry ether followed by aqueous work-up. The final product ... JEE Main level
Which of the following conversions of benzenediazonium chloride does NOT occur as stated? JEE Main level
Ethylamine is treated with NaNO2 and dil. HCl at 273-278 K. The principal reaction is JEE Main level
Benzenediazonium chloride reacts with the reagents listed. Select all the pairs in which the stated product is correct. JEE Main level
Which of the following amines, when diazotised with NaNO2 / dil. HCl at 273-278 K and then treated with H3PO2, give toluene? JEE Main level
Aniline (18.6 g) is converted to benzenediazonium chloride in 90 % yield, and the diazonium salt is hydrolysed to phenol in 75 % yield. Using atomic masses H = ... JEE Main level
Count the primary aromatic amines of molecular formula C8H11N in which the -NH2 group is attached directly to a benzene ring. Count constitutional (positional) ... JEE Advanced level
Aniline is converted into 1,3,5-tribromobenzene. Which sequence of reagents achieves this? JEE Advanced level
Aniline is subjected to: (i) (CH3CO)2O / pyridine; (ii) Br2 in ethanoic acid (1 equiv.); (iii) dilute HCl, heat (hydrolysis); (iv) NaNO2 / dil. HCl, 273-278 K; ... JEE Advanced level
4-Methylaniline is subjected to: (i) (CH3CO)2O / pyridine; (ii) HNO3 + H2SO4 at low temperature (mononitration); (iii) aqueous NaOH, heat (hydrolysis); (iv) NaN... JEE Advanced level
Aniline is treated with (i) NaNO2 / dil. HCl at 273-278 K, then (ii) SnCl2/HCl to give X. X is then warmed with propanone (acetone) to give Y. Y is JEE Advanced level
4-Nitroaniline is diazotised (NaNO2 / dil. HCl, 273-278 K) and then treated with H3PO2 to give P. P is reduced with Sn/HCl to Q, and Q is treated with excess Br... JEE Advanced level
Nitrobenzene is converted into 1,3-dibromobenzene. Which sequence works? JEE Advanced level
Warming an aqueous solution of benzenediazonium chloride gives mainly NEET level
Benzenediazonium chloride is converted into chlorobenzene by NEET level
Aniline is converted into benzenediazonium chloride by treating it with NEET level
Benzenediazonium chloride is treated with HBF4 and the precipitate of benzenediazonium tetrafluoroborate is filtered and heated. The organic product is JEE Main level
In which of the following conversions of benzenediazonium chloride is a copper salt NOT needed? JEE Main level
Benzenediazonium chloride couples with phenol most efficiently in a medium of JEE Main level
Benzenediazonium chloride reacts with N,N-dimethylaniline at pH 4-5. The major product is JEE Main level
Aromatic diazonium salts are stable in solution at 273-278 K, but aliphatic diazonium salts decompose at once, mainly because JEE Main level
4-Bromo-2-methylaniline is diazotised with NaNO2 / dil. HCl at 273-278 K and the product is treated with H3PO2 and water. The final organic product is JEE Main level
Which of the following conversions of benzenediazonium chloride with the reagent shown are correct? JEE Main level
Which sequence converts aniline into 1,3,5-tribromobenzene? JEE Advanced level
4-Nitrotoluene is to be converted into 3-bromotoluene. Which sequence is correct? JEE Advanced level
Aniline is treated successively with (i) NaNO2 / dil. HCl at 273-278 K to give A, (ii) CuCN/KCN to give B, and (iii) H2 / Ni to give C. C is JEE Advanced level
Assertion: Coupling of benzenediazonium chloride with aniline to give 4-aminoazobenzene is carried out in a mildly acidic medium (pH 4-5) and not in strongly ac... JEE Advanced level
Which statements about coupling of arenediazonium salts are correct? JEE Advanced level
On treatment with NaNO2 / dil. HCl at 273-278 K, which of the following give an arenediazonium salt that can be used for coupling? JEE Advanced level
When an aqueous solution of benzenediazonium chloride is warmed, which statements are correct? JEE Advanced level
9.3 g of aniline is converted into 1,3,5-tribromobenzene in three steps: bromination with Br2 water to 2,4,6-tribromoaniline (90 per cent yield), diazotisation ... JEE Advanced level