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Benzenediazonium chloride on reaction wi...

Benzenediazonium chloride on reaction with phenol in weakly basic medium gives

A

Diphenyl ether

B

p-Hydroxyazobenzene

C

Chlorobenzene

D

Benzene

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The correct Answer is:
B
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Benzene diazonium chloride on reaction with phenol in weakly basic medium gives

Diazonium salt formation and coupling reaction: When a reaction mixture of phenyl amine and nitrous acid is kept below 10^(@)C , a diazonium salt is formed. This reaction is called diazotization reaction. The diazonium ion, -N_(2)^(+) , is rather unstable and decomposes readily to nitrogen. However, delocalization of the diazonium from pi- bond electron over a benzene ring phenyl diazonium sufficiently for it to form at low temperature. The phenyl diazonium ion behaves as an electrophile, and will attack another arene molecule such as phenol. Electrophilic subsitiution takes at the 4 position, producing 4-hydroxy phenyl azobenzene. The reaction is known as coupling reaction. The compound formed is an energetically stable, yellow azo dye (the azo group is -N=N- ) The stability is due to extensive delocalisation of electrons via the nitrogen- nitrogen double bonds. Benzene diazonium chloride on reaction with phenol in weakly basic medium gives :

Benzenediazonium chloride on reaction with aniline in weakly basic medium gives

Benzene diazonium chloride on reaction with phenol in a basic medium gives:

Benzenediazonium chloride on reaction with water gives

What happens when benzene diazonium chloride reacts with phenol in weak alkaline medium ? (Give balanced equation)

Benzene diazonium chloride on reaction with aniline in the presence of dilute hydrochloric acid gives :

Benzene diazonium chloride on reaction with aniline in the presence of dilute hydrochloric acid gives :

Benzene diazonium chloride on reaction with aniline in the presence of dilute hydrochloric acid gives :

Benzenediazonium chloride is reduced to benzene by

ALLEN-ALKENE, ALKANE & ALKYNE -EXERCISE-5[B]
  1. p-Chloroaniline and anilinium hydrochloride can be distinguished by :

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  2. Statement : Benozonitrile is prepared by the reaction of chlorobenzene...

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  3. Benzenediazonium chloride on reaction with phenol in weakly basic medi...

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  4. A positive carbylamine test is shown by :

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  5. Among the following, the strongest base is:

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  6. Assertion : In strongly acidic solution, aniline becomes less reactive...

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  7. The correct order of basicities of the following compounds is - (I) ...

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  8. When phenol is treated with Br(2)-water, the product is

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  9. CH(3) NH(2) + CHCl(3) + KOH rarr Nitrogen containing compound + KCl + ...

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  10. In the following reaction, underset("conc." H(2)SO(4))overset("conc."...

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  11. An organic compound contains 69.4% carbon and 5.8% hydrogen. A sample ...

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  12. Compound 'X' containing chlorine, on treatment with NH(3) gives a soli...

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  13. Show with equations how the following compounds are repared (equations...

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  14. Complete the following with appropriate structures :

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  15. The aqueous solution of a nitrogen and chlorine containing compound (A...

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  16. Complete the following with appropriate structures : 2,3 "-Dinitroan...

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  17. Complete the following reaction with appropriate reagents :

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  18. Compund (A), C(5)H(11)NO is not soluble in cold alkaline or acidic sol...

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  19. Identify (A) to (D) in the following series of reactions : underset...

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  20. underset ((X)) underset ("Optically active") (C5 H(13)N) underset (N2)...

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