75 free MCQs on Alcohols, Phenols & Ethers, each with its own worked answer and explanation. Oxygen-containing organic compounds. Understand the acidic nature of phenols, reactions of alcohols (dehydration, oxidation, esterification), and properties of ethers. Includes industrial applications and named reactions.
Take the timed Alcohols, Phenols & Ethers chapterwise test →75 practice questions on Alcohols, Phenols & Ethers, sorted Easy → Hard. Try each one first, then open its answer page for the worked explanation. Want the full theory first? Read the Alcohols, Phenols & Ethers notes.
The phenoxide ion's negative charge spreads into the aromatic ring through resonance, lowering its energy and making phenol give up its proton more easily; an alkoxide ion (from a plain alcohol) has nowhere to delocalise the charge, making alcohols far less acidic.
Q1.
2-Methylpropan-2-ol, (CH<sub>3</sub>)<sub>3</sub>COH, is classified as which type of alcohol?
Q2.
Between ethanol and its isomer dimethyl ether (both C<sub>2</sub>H<sub>6</sub>O), the higher boiling point belongs to:
Q3.
The general molecular formula of a saturated monohydric alcohol is:
Q4.
Rectified spirit contains approximately what percentage of ethanol?
Q5.
The C-O-H bond angle in methanol is close to:
Q6.
Which functional group is present in alcohols?
Q7.
What type of alcohol is CH<sub>3</sub>CH<sub>2</sub>OH?
Q8.
Which alcohol is highly poisonous?
Q9.
Which reagent is used in Lucas test?
Q10.
Which alcohol reacts fastest in Lucas test?
Q11.
Why do alcohols have higher boiling points than alkanes?
Q12.
Which alcohol is commonly used in sanitizers?
Q13.
What is the common name of propane-1,2,3-triol?
Q14.
Phenol differs from alcohol because OH group is attached to:
Q15.
Denatured alcohol is ethanol mixed with:
Q16.
Which alcohol is used as antifreeze?
Q17.
Which compound contains an ether linkage?
Q18.
Which alcohol is produced during fermentation of sugar?
Q19.
What is the IUPAC name of CH<sub>3</sub>OH?
Q20.
Which type of alcohol has the OH-bearing carbon attached to three alkyl groups?
Q21.
Which compound is aromatic?
Q22.
Which compound is used as a solvent and was formerly used as an anesthetic?
Q23.
Which compound gives violet colour with FeCl<sub>3</sub>?
Q24.
Which alcohol has the formula C<sub>2</sub>H<sub>5</sub>OH?
Q25.
Which intermolecular force is strongest in alcohols?
Q26.
The correct order of acidic strength is:
Q27.
Which of the following is the most acidic?
Q28.
Which combination in Williamson synthesis best gives 2-methoxy-2-methylpropane (MTBE)?
Q29.
Phenol on heating with zinc dust gives:
Q30.
When its vapour is passed over heated copper at 573 K, a tertiary alcohol gives:
Q31.
What is the major product when ethanol is dehydrated at 443 K?
Q32.
Which alcohol on oxidation gives an aldehyde?
Q33.
Which alcohol on oxidation gives a ketone?
Q34.
Why is phenol more acidic than ethanol?
Q35.
Which reaction is used to prepare ethers from alkyl halides?
Q36.
Phenol reacts with sodium metal to produce:
Q37.
Which reagent converts alcohol into alkene by dehydration?
Q38.
What is formed when phenol reacts with bromine water?
Q39.
Which alcohol does not undergo oxidation easily?
Q40.
What is the product formed when ethanol reacts with sodium?
Q41.
Which acid acts as catalyst in esterification?
Q42.
What is the product when ethanol is oxidised using acidified KMnO<sub>4</sub>?
Q43.
Which ether is formed by Williamson synthesis using sodium ethoxide and methyl bromide?
Q44.
Which compound gives a white precipitate with bromine water?
Q45.
What happens when ether reacts with excess HI?
Q46.
Which alcohol is produced by hydration of ethene?
Q48.
Which product is formed during intermolecular dehydration of ethanol at 413 K?
Q49.
What colour is produced when phenol reacts with neutral FeCl<sub>3</sub>?
Q50.
Which alcohol forms a ketone on oxidation?
Q51.
Acid-catalysed dehydration of butan-2-ol gives predominantly:
Q52.
o-Nitrophenol is steam-volatile while p-nitrophenol is not, because the ortho isomer:
Q53.
Which pair can be told apart by the iodoform test, one giving a positive result and the other negative?
Q54.
Sodium phenoxide reacting with ethyl bromide gives:
Q55.
In the industrial cumene process, phenol is obtained together with:
Q56.
Which product is formed in Kolbe reaction of sodium phenoxide with CO<sub>2</sub>?
Q57.
Reimer-Tiemann reaction converts phenol into:
Q58.
Which intermediate forms during acid-catalysed dehydration of alcohols?
Q59.
Which alcohol undergoes dehydration most easily?
Q60.
What is formed when ethanol reacts with ethanoic acid in presence of concentrated H<sub>2</sub>SO<sub>4</sub>?
Q61.
Which alcohol cannot be oxidised easily?
Q62.
What is the major product when tert-butanol undergoes dehydration?
Q63.
Which reagent is used in Clemmensen reduction?
Q64.
Phenol reacts with benzene diazonium chloride to form:
Q65.
Which reaction involves rearrangement of vicinal diols?
Q66.
Which product is formed when phenol reacts with NaOH?
Q67.
Which reagent converts phenol into picric acid?
Q68.
What is the product of oxidation of propan-1-ol with PCC?
Q69.
Which alcohol gives positive iodoform test?
Q70.
Which compound undergoes Kolbe electrolysis to give ethane?
Q71.
What is the role of concentrated H<sub>2</sub>SO<sub>4</sub> in esterification?
Q72.
Which product is formed when anisole reacts with HI?
Q73.
Which compound gives violet colour with FeCl<sub>3</sub> due to phenolic OH group?
Q74.
Which intermediate is formed during Williamson ether synthesis?
Q75.
Which alcohol gives ketone on oxidation?
or take the timed test and get a score instead of just reading