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How is carbolic acid prepared from benzene diazonium chloride?
- a)Treating it with nitrous acid at 275K
- b)Preparing an aqueous solution and warming it
- c)Treating it with sodium hydroxide
- d)Freezing it
Correct answer is option 'B'. Can you explain this answer?
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How is carbolic acid prepared from benzene diazonium chloride?a)Treati...
Preparation of Carbolic Acid from Benzene Diazonium Chloride:
Step 1: Diazotization reaction
- Benzene is treated with nitrous acid at 0-5°C to form benzene diazonium chloride.
Step 2: Preparation of Aqueous Solution
- The obtained benzene diazonium chloride is dissolved in water to form an aqueous solution.
Step 3: Warming of Aqueous Solution
- The aqueous solution of benzene diazonium chloride is warmed to about 70-80°C.
Step 4: Reaction with Sodium Hydroxide
- Sodium hydroxide solution is added to the warmed aqueous solution of benzene diazonium chloride.
Step 5: Formation of Carbolic Acid
- The reaction between benzene diazonium chloride and sodium hydroxide forms carbolic acid or phenol.
Explanation:
- Benzene diazonium chloride is prepared by treating benzene with nitrous acid at 0-5°C.
- The obtained benzene diazonium chloride is dissolved in water to form an aqueous solution.
- This aqueous solution is then warmed to about 70-80°C.
- Sodium hydroxide solution is added to the warmed aqueous solution of benzene diazonium chloride.
- The reaction between benzene diazonium chloride and sodium hydroxide forms carbolic acid or phenol.
- The reaction can be represented as follows:
C6H5N2Cl + NaOH → C6H5OH + N2 + NaCl
- Carbolic acid or phenol is a white crystalline solid with a sweet odor and is widely used in the production of various chemicals and drugs.
Therefore, option B is the correct answer as carbolic acid is prepared from benzene diazonium chloride by preparing an aqueous solution and warming it.
Step 1: Diazotization reaction
- Benzene is treated with nitrous acid at 0-5°C to form benzene diazonium chloride.
Step 2: Preparation of Aqueous Solution
- The obtained benzene diazonium chloride is dissolved in water to form an aqueous solution.
Step 3: Warming of Aqueous Solution
- The aqueous solution of benzene diazonium chloride is warmed to about 70-80°C.
Step 4: Reaction with Sodium Hydroxide
- Sodium hydroxide solution is added to the warmed aqueous solution of benzene diazonium chloride.
Step 5: Formation of Carbolic Acid
- The reaction between benzene diazonium chloride and sodium hydroxide forms carbolic acid or phenol.
Explanation:
- Benzene diazonium chloride is prepared by treating benzene with nitrous acid at 0-5°C.
- The obtained benzene diazonium chloride is dissolved in water to form an aqueous solution.
- This aqueous solution is then warmed to about 70-80°C.
- Sodium hydroxide solution is added to the warmed aqueous solution of benzene diazonium chloride.
- The reaction between benzene diazonium chloride and sodium hydroxide forms carbolic acid or phenol.
- The reaction can be represented as follows:
C6H5N2Cl + NaOH → C6H5OH + N2 + NaCl
- Carbolic acid or phenol is a white crystalline solid with a sweet odor and is widely used in the production of various chemicals and drugs.
Therefore, option B is the correct answer as carbolic acid is prepared from benzene diazonium chloride by preparing an aqueous solution and warming it.
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Community Answer
How is carbolic acid prepared from benzene diazonium chloride?a)Treati...
Carbolic acid is another name for phenol. Simply warming an aqueous solution of benzene diazonium chloride salt or treating it with a dilute acid, will result in the formation of phenol.
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How is carbolic acid prepared from benzene diazonium chloride?a)Treating it with nitrous acid at 275Kb)Preparing an aqueous solution and warming itc)Treating it with sodium hydroxided)Freezing itCorrect answer is option 'B'. Can you explain this answer?
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