1
Phenols
Some Important Questions
1. What happens when: phenol is heated with ammonia in presence of dehydrating agent.[4]
2. Explain Friedel Craft’s reaction and coupling reaction with an example.[4]
3. How can you convert phenol into:
a) Chlorobenzene b) Aniline c) Picric Acid
4. What happens when: Phenol is distilled in presence of Zn-dust?
5. What happen when phenol is reacted with acetic acid.[2]
6. How phenol is prepared in laboratory? Write the action of chloroform on phenol in
presence of NaOH.[4]
7. Write short note on: Coupling reaction.[4]
8. Write short notes on uses of phenol in everyday life.[4]
9. Complete the following reactions:
C6H5OH + Br2 → ?
Definition of Phenol
Hydroxy derivatives of arenes, where the –OH group is directly attached to the aromatic
ring are called phenols.
−𝐻
i.e. Ar-H(Arene) +𝑂𝐻 Ar-OH(Phenol)
Phenol is colourless crystalline solid. It is moderately soluble in water but readily soluble
in organic solvents. Phenol with 5% water is commonly called carbolic acid.
Preparation of phenol
From diazonium salt (Laboratory method):
Phenol is prepared in the laboratory by warming an aqueous solution of diazonium chloride.
Chemical properties of phenol
1. Action with zinc dust : When phenol is heated with zinc dust benzene is formed.
Phenols
Some Important Questions
1. What happens when: phenol is heated with ammonia in presence of dehydrating agent.[4]
2. Explain Friedel Craft’s reaction and coupling reaction with an example.[4]
3. How can you convert phenol into:
a) Chlorobenzene b) Aniline c) Picric Acid
4. What happens when: Phenol is distilled in presence of Zn-dust?
5. What happen when phenol is reacted with acetic acid.[2]
6. How phenol is prepared in laboratory? Write the action of chloroform on phenol in
presence of NaOH.[4]
7. Write short note on: Coupling reaction.[4]
8. Write short notes on uses of phenol in everyday life.[4]
9. Complete the following reactions:
C6H5OH + Br2 → ?
Definition of Phenol
Hydroxy derivatives of arenes, where the –OH group is directly attached to the aromatic
ring are called phenols.
−𝐻
i.e. Ar-H(Arene) +𝑂𝐻 Ar-OH(Phenol)
Phenol is colourless crystalline solid. It is moderately soluble in water but readily soluble
in organic solvents. Phenol with 5% water is commonly called carbolic acid.
Preparation of phenol
From diazonium salt (Laboratory method):
Phenol is prepared in the laboratory by warming an aqueous solution of diazonium chloride.
Chemical properties of phenol
1. Action with zinc dust : When phenol is heated with zinc dust benzene is formed.
