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In the diazotisation of aniline the excess of hydrochloric acid is used primarily with sodium nitrite because it
- a)supresses the conc. of free aniline
- b)supresses the hydrolysis to phenol
- c)ensures a stoichiometric amount of nitrous acid
- d)neutralises the base liberated
Correct answer is option 'A'. Can you explain this answer?
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In the diazotisation of aniline the excess of hydrochloric acid is use...
Suppression of the concentration of free aniline:
Excess hydrochloric acid is used in the diazotisation of aniline to suppress the concentration of free aniline in the reaction mixture. Aniline can react with nitrous acid formed during the reaction to form a diazonium salt. By adding excess hydrochloric acid, the concentration of free aniline is reduced, promoting the formation of the diazonium salt.
Explanation:
Aniline reacts with sodium nitrite in the presence of hydrochloric acid to form a diazonium salt. If there is excess aniline present in the reaction mixture, it can react with the nitrous acid formed during the reaction to produce unwanted by-products. To prevent this, excess hydrochloric acid is used to keep the concentration of free aniline low.
Suppression of hydrolysis to phenol:
Excess hydrochloric acid also helps to suppress the hydrolysis of the diazonium salt to phenol. If the concentration of free aniline is high, it can lead to the formation of phenol as a by-product. By using excess hydrochloric acid, the hydrolysis process is minimized.
Ensuring a stoichiometric amount of nitrous acid:
Excess hydrochloric acid also helps to ensure that a stoichiometric amount of nitrous acid is available for the diazotisation reaction. The presence of excess hydrochloric acid helps to stabilize the formation of nitrous acid, which is crucial for the conversion of aniline to the diazonium salt.
In conclusion, the excess of hydrochloric acid is primarily used in the diazotisation of aniline to suppress the concentration of free aniline, suppress the hydrolysis to phenol, and ensure a stoichiometric amount of nitrous acid for the reaction.
Excess hydrochloric acid is used in the diazotisation of aniline to suppress the concentration of free aniline in the reaction mixture. Aniline can react with nitrous acid formed during the reaction to form a diazonium salt. By adding excess hydrochloric acid, the concentration of free aniline is reduced, promoting the formation of the diazonium salt.
Explanation:
Aniline reacts with sodium nitrite in the presence of hydrochloric acid to form a diazonium salt. If there is excess aniline present in the reaction mixture, it can react with the nitrous acid formed during the reaction to produce unwanted by-products. To prevent this, excess hydrochloric acid is used to keep the concentration of free aniline low.
Suppression of hydrolysis to phenol:
Excess hydrochloric acid also helps to suppress the hydrolysis of the diazonium salt to phenol. If the concentration of free aniline is high, it can lead to the formation of phenol as a by-product. By using excess hydrochloric acid, the hydrolysis process is minimized.
Ensuring a stoichiometric amount of nitrous acid:
Excess hydrochloric acid also helps to ensure that a stoichiometric amount of nitrous acid is available for the diazotisation reaction. The presence of excess hydrochloric acid helps to stabilize the formation of nitrous acid, which is crucial for the conversion of aniline to the diazonium salt.
In conclusion, the excess of hydrochloric acid is primarily used in the diazotisation of aniline to suppress the concentration of free aniline, suppress the hydrolysis to phenol, and ensure a stoichiometric amount of nitrous acid for the reaction.
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In the diazotisation of aniline the excess of hydrochloric acid is used primarily with sodium nitrite because ita)supresses the conc. of free anilineb)supresses the hydrolysis to phenolc)ensures a stoichiometric amount of nitrous acidd)neutralises the base liberatedCorrect answer is option 'A'. Can you explain this answer?
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In the diazotisation of aniline the excess of hydrochloric acid is used primarily with sodium nitrite because ita)supresses the conc. of free anilineb)supresses the hydrolysis to phenolc)ensures a stoichiometric amount of nitrous acidd)neutralises the base liberatedCorrect answer is option 'A'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about In the diazotisation of aniline the excess of hydrochloric acid is used primarily with sodium nitrite because ita)supresses the conc. of free anilineb)supresses the hydrolysis to phenolc)ensures a stoichiometric amount of nitrous acidd)neutralises the base liberatedCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the diazotisation of aniline the excess of hydrochloric acid is used primarily with sodium nitrite because ita)supresses the conc. of free anilineb)supresses the hydrolysis to phenolc)ensures a stoichiometric amount of nitrous acidd)neutralises the base liberatedCorrect answer is option 'A'. Can you explain this answer?.
In the diazotisation of aniline the excess of hydrochloric acid is used primarily with sodium nitrite because ita)supresses the conc. of free anilineb)supresses the hydrolysis to phenolc)ensures a stoichiometric amount of nitrous acidd)neutralises the base liberatedCorrect answer is option 'A'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about In the diazotisation of aniline the excess of hydrochloric acid is used primarily with sodium nitrite because ita)supresses the conc. of free anilineb)supresses the hydrolysis to phenolc)ensures a stoichiometric amount of nitrous acidd)neutralises the base liberatedCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In the diazotisation of aniline the excess of hydrochloric acid is used primarily with sodium nitrite because ita)supresses the conc. of free anilineb)supresses the hydrolysis to phenolc)ensures a stoichiometric amount of nitrous acidd)neutralises the base liberatedCorrect answer is option 'A'. Can you explain this answer?.
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In the diazotisation of aniline the excess of hydrochloric acid is used primarily with sodium nitrite because ita)supresses the conc. of free anilineb)supresses the hydrolysis to phenolc)ensures a stoichiometric amount of nitrous acidd)neutralises the base liberatedCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for In the diazotisation of aniline the excess of hydrochloric acid is used primarily with sodium nitrite because ita)supresses the conc. of free anilineb)supresses the hydrolysis to phenolc)ensures a stoichiometric amount of nitrous acidd)neutralises the base liberatedCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of In the diazotisation of aniline the excess of hydrochloric acid is used primarily with sodium nitrite because ita)supresses the conc. of free anilineb)supresses the hydrolysis to phenolc)ensures a stoichiometric amount of nitrous acidd)neutralises the base liberatedCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an
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