Welcome to the Quiz!
This quiz contains 14 questions from a mix of 1 subtopics.
What is the key structural feature of a phenol?
an aliphatic chain attached to a hydroxyl group
an aromatic benzene ring attached to a carboxyl group
an aromatic benzene ring attached to a hydroxyl group
an aliphatic chain attached to a carboxyl group
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How does the reactivity of phenol compare to benzene in electrophilic substitution reactions?
phenol is less reactive than benzene
phenol is more reactive than benzene
phenol and benzene have similar reactivity
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Which of the following contributes to phenol's increased reactivity compared to benzene?
the electron-donating -OH group activates the aromatic ring
the -OH group reduces the electron density within the ring
the electron-donating -OH group deactivates the aromatic ring
the lone pair of electrons on the oxygen atom is not involved in the aromatic π system
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What is the first step in the synthesis of phenol from phenylamine?
nitration
bromination
diazotisation
decomposition
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In the diazotisation step, what is the product formed from the reaction between phenylamine and nitrous acid?
benzenediazonium chloride
sodium nitrite
phenol
nitrogen gas
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What happens to the diazonium salt in the second step of phenol synthesis from phenylamine?
it undergoes further diazotisation
it decomposes to form phenol
it undergoes nitration
it reacts with sodium nitrite
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Which of the following correctly represents the order of increasing acidity of phenol, water, and ethanol?
ethanol < water < phenol
water < ethanol < phenol
phenol < water < ethanol
ethanol < phenol < water
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What happens to the negative charge in the phenoxide ion after phenol dissociates?
the charge remains localised on the oxygen atom
the charge is transferred to the hydrogen atom
the charge is neutralised by the aromatic ring
the charge becomes delocalised over the aromatic ring system
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What happens when phenol is treated with bromine water?
bromine water is decolourised, and 2,4-diibromophenol precipitates
bromine water turns orange, and 2,4,6-tribromophenol precipitates
bromine water turns orange, and 2,4-diibromophenol precipitates
bromine water is decolourised, and 2,4,6-tribromophenol precipitates
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Which are the products formed when phenol undergoes direct nitration with dilute nitric acid?
(Select all that apply).
3-nitrophenol
2,4,6-trinitrophenol
2-nitrophenol
4-nitrophenol
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What are the products formed when phenol reacts with sodium hydroxide (NaOH)?
sodium phenoxide and hydrogen
sodium phenoate and water
sodium phenoxide and water
sodium phenoate and hydrogen
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Why does phenol not react with sodium carbonate (Na2CO3) solution?
phenol is a relatively weak acid
phenol is a strong acid
sodium carbonate is insoluble in water
sodium carbonate is a weak base
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What are the products formed when phenol reacts with sodium metal?
phenol and water
phenol and hydrogen gas
sodium phenoxide and water
sodium phenoxide and hydrogen gas
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Explain why phenol is more reactive than benzene in electrophilic substitution reactions.
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