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In the diazotisation of aryl amines with...

In the diazotisation of aryl amines with sodium nitrite and hydrochloric acid, an excess of hydrochloric acid is used primarily to

A

supress the concentration of free aniline available for coupling

B

supress hydrolysis of phenol

C

ensure a stoichiometric amount of nitrous acid

D

neutralise the base liberated

Text Solution

Verified by Experts

The correct Answer is:
A
Excess of HCI is used to convert free aniline to aniline hydrochloride otherwise free aniline would undergo coupling reaction with benzene diazonium chloride.
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ACCURATE PUBLICATION-ORGANIC COMPOUNDS CONTAINING NITROGEN COMPOUNDS-MULTIPLE CHOICE QUESTIONS
  1. Aniline on reaction with acetyl chloride gives

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  2. CH3 CH2CI + NaCN to X+Ni//H2 to Y+ Acetic anhydride to Z. Z in...

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  3. Consider the following reaction C6H5NO2+Sn//HCl to X+C6H5COCl ...

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  4. Hinsberg reagent is

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  5. Write the reactions of aliphatic primary amines with nitrous acid.

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  6. Diazonium salts are reaction products between nitrous acid and

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  7. Aniline reacts with NaNO2 and HCl at room temperature to give

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  8. Which of the following reacts with NaNO2 + HCl at 273-278 K to give al...

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  9. In the diazotisation of aryl amines with sodium nitrite and hydrochlor...

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  10. Name any three food items each rich in protein, dietary fibre?

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  11. Phenyl isocyanide is prepared by which of the following reaction?

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  12. Unpleasant smelling carbylamines are formed by heating alkali and chlo...

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  13. Which of the following compounds cannot be identified by carbylamine t...

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  14. Whenbenzenediazonium chloride in hydrochloric acid reacts with cuprous...

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  15. Primary amines on heating with CS2 followed by excess of mercuric chlo...

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  16. Reaction of aniline with benzaldehyde is

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  17. Do all foods contain all the required nutrients?

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  18. Aniline when treated with conc. HNO3 gives

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  19. Aniline upon heating with conc.HNO3 and conc.H2SO4 mixture gives:

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  20. Towards electrophilic substitution, the most reactive will be

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