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In the diazotisation of aniline with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily to
- a)Supress the concentration of free aniline
- b)Supress the hydrolysis to phenol
- c)Ensure a stochiometric amount of nitrous acid
- d)Neutralise the base liberated
Correct answer is option 'B'. Can you explain this answer?
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In the diazotisation of aniline with sodium nitrite and hydrochloric a...
Suppression of Hydrolysis to Phenol:
Aniline can undergo hydrolysis in the presence of excess acid to form phenol. This reaction involves the cleavage of the nitrogen-carbon bond in aniline, leading to the formation of phenol. By using excess hydrochloric acid in the diazotisation of aniline, the concentration of free aniline is suppressed, which in turn reduces the chances of hydrolysis to phenol.
Prevention of Unwanted Reactions:
The excess of hydrochloric acid also helps in preventing unwanted side reactions by maintaining a controlled environment during the diazotisation process. This ensures that the desired reaction, i.e., the formation of the diazonium salt, proceeds smoothly without interference from other possible reactions.
Stoichiometric Amount of Nitrous Acid:
While excess hydrochloric acid is used primarily to suppress the hydrolysis of aniline to phenol, it also plays a role in ensuring the formation of a stoichiometric amount of nitrous acid during the diazotisation process. Nitrous acid is crucial for the conversion of aniline to the diazonium salt, and the presence of excess hydrochloric acid helps in maintaining the appropriate conditions for this conversion to occur efficiently.
In conclusion, the excess of hydrochloric acid in the diazotisation of aniline serves multiple purposes, including the suppression of hydrolysis to phenol, prevention of unwanted reactions, and ensuring the formation of a stoichiometric amount of nitrous acid. These factors contribute to the overall success of the diazotisation process in organic chemistry.
Aniline can undergo hydrolysis in the presence of excess acid to form phenol. This reaction involves the cleavage of the nitrogen-carbon bond in aniline, leading to the formation of phenol. By using excess hydrochloric acid in the diazotisation of aniline, the concentration of free aniline is suppressed, which in turn reduces the chances of hydrolysis to phenol.
Prevention of Unwanted Reactions:
The excess of hydrochloric acid also helps in preventing unwanted side reactions by maintaining a controlled environment during the diazotisation process. This ensures that the desired reaction, i.e., the formation of the diazonium salt, proceeds smoothly without interference from other possible reactions.
Stoichiometric Amount of Nitrous Acid:
While excess hydrochloric acid is used primarily to suppress the hydrolysis of aniline to phenol, it also plays a role in ensuring the formation of a stoichiometric amount of nitrous acid during the diazotisation process. Nitrous acid is crucial for the conversion of aniline to the diazonium salt, and the presence of excess hydrochloric acid helps in maintaining the appropriate conditions for this conversion to occur efficiently.
In conclusion, the excess of hydrochloric acid in the diazotisation of aniline serves multiple purposes, including the suppression of hydrolysis to phenol, prevention of unwanted reactions, and ensuring the formation of a stoichiometric amount of nitrous acid. These factors contribute to the overall success of the diazotisation process in organic chemistry.
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In the diazotisation of aniline with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily toa)Supress the concentration of free anilineb)Supress the hydrolysis to phenolc)Ensure a stochiometric amount of nitrous acidd)Neutralise the base liberatedCorrect answer is option 'B'. Can you explain this answer?
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In the diazotisation of aniline with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily toa)Supress the concentration of free anilineb)Supress the hydrolysis to phenolc)Ensure a stochiometric amount of nitrous acidd)Neutralise the base liberatedCorrect answer is option 'B'. 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 with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily toa)Supress the concentration of free anilineb)Supress the hydrolysis to phenolc)Ensure a stochiometric amount of nitrous acidd)Neutralise the base liberatedCorrect answer is option 'B'. 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 with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily toa)Supress the concentration of free anilineb)Supress the hydrolysis to phenolc)Ensure a stochiometric amount of nitrous acidd)Neutralise the base liberatedCorrect answer is option 'B'. Can you explain this answer?.
In the diazotisation of aniline with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily toa)Supress the concentration of free anilineb)Supress the hydrolysis to phenolc)Ensure a stochiometric amount of nitrous acidd)Neutralise the base liberatedCorrect answer is option 'B'. 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 with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily toa)Supress the concentration of free anilineb)Supress the hydrolysis to phenolc)Ensure a stochiometric amount of nitrous acidd)Neutralise the base liberatedCorrect answer is option 'B'. 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 with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily toa)Supress the concentration of free anilineb)Supress the hydrolysis to phenolc)Ensure a stochiometric amount of nitrous acidd)Neutralise the base liberatedCorrect answer is option 'B'. Can you explain this answer?.
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In the diazotisation of aniline with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily toa)Supress the concentration of free anilineb)Supress the hydrolysis to phenolc)Ensure a stochiometric amount of nitrous acidd)Neutralise the base liberatedCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for In the diazotisation of aniline with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily toa)Supress the concentration of free anilineb)Supress the hydrolysis to phenolc)Ensure a stochiometric amount of nitrous acidd)Neutralise the base liberatedCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of In the diazotisation of aniline with sodium nitrite and hydrochloric acid, the excess of hydrochloric acid is used primarily toa)Supress the concentration of free anilineb)Supress the hydrolysis to phenolc)Ensure a stochiometric amount of nitrous acidd)Neutralise the base liberatedCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
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