30 Questions
What is the primary purpose of using phenol in the manufacture of nylon and artificial tannins?
As a precursor to develop the necessary functional groups
Which reaction involves the formation of a complex compound, resulting in a violet colouration?
Reaction with ferric chloride
What is the product formed when phenol reacts with phthalic anhydride in the presence of concentrated sulphuric acid?
Phenolphthalein
What is the purpose of using phenol in the preparation of disinfectants, fungicides, and bactericides?
As an active ingredient providing antimicrobial properties
What is the characteristic odour associated with phenol?
Typical phenolic
What is the product of the condensation reaction between phenol and CH2O?
Bakelite resin
What is the colour of the solution when phenol is reacted with NaNO2 and concentrated H2SO4, and then diluted with water?
Red
Which of the following is a derivative of phenol used as an antiseptic?
2, 4-dichloro-3, 5-dimethyl phenol
What is the application of phenol in the production of nylon?
In the manufacture of cyclohexanol
What is the product of the reaction between phenol and NaNO2 in the presence of concentrated H2SO4?
p-Nitrosophenol
What is the reason for the higher boiling points and solubility in water of phenols?
The strong intermolecular hydrogen bonding and high dipole moment
What is the characteristic of phenol that distinguishes it from hydrocarbons of comparable molecular weights?
Higher melting points and boiling points
What is the reason for the violet colouration of phenol with ferric chloride solution?
The formation of a coloured iron complex
What is the effect of the position of the substituent on the strength of phenol as an acid?
The strength of phenol as an acid is higher when the substituent is in the o- or p-position
What is the reaction of phenol with strong alkalies?
It forms phenoxides
What is the reason for the acidity of phenol?
Due to the formation of a stable phenoxide ion
What is the product formed when phenol reacts with alkyl halides in alkali solution?
Phenol ethers
Why are phenols more acidic than alcohols?
Due to the delocalisation of the negative charge in the benzene ring
What is the effect of electron-attracting groups on the acidity of phenol?
They increase the acidity of phenol
Why is the phenoxide ion stable?
Due to the delocalisation of the negative charge
What is the product formed when a carboxylic acid is reduced with LiAlH4?
An alcohol
What is the name of the reduction reaction where aluminium isopropoxide is used as the reducing agent?
Meerwein-Ponndorf-Verley reduction
What is the product formed when an ester undergoes alkaline hydrolysis?
An acid and an alcohol
What is the characteristic of alcohols that distinguishes them from hydrocarbons of comparable molecular weights?
Higher boiling points and solubility in water
What is the effect of hydrogen bonding on the physical properties of alcohols?
Increases boiling points and solubility in water
Why do phenols have high boiling points?
Due to their ability to form hydrogen bonds with water
What is the effect of the position of a substituent on the strength of phenol as an acid?
The strength of phenol as an acid increases when the substituent is in the o- or p-position
What is the product formed when phenol reacts with sodium hydroxide?
Sodium phenoxide and water
Why is phenol sparingly soluble in water but readily soluble in organic solvents?
Due to its high dipole moment and intermolecular H-bonding
What is the characteristic of phenol that distinguishes it from hydrocarbons of comparable molecular weights?
Higher dipole moment and intermolecular H-bonding
This quiz covers the various uses of phenol, including in the manufacture of drugs and the preparation of disinfectants, as well as tests to identify phenol, such as its reaction with ferric chloride and bromine water.
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