Organic Chemistry Questions and Answers – Reaction of Alcohols | Organic Chemistry Multiple Choice Questions and Answers

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Questions
1 Which one of the following compound is obtained by the oxidation of primary alcohol with nascent oxygen?
A Alkanal
B Alkanone
C Ether
D Amine

Answer: Alkanal
2 Which one of the following compound is obtained by the oxidation of secondary alcohols by [O]?
A Ketone
B Aldehyde
C Ether
D Amine

Answer: Ketone
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3 Secondary alcohols on catalytic dehydrogenation by Cu-Ni couple gives ___________
A Ketone
B Aldehyde
C Carboxylic acid
D Amine

Answer: Ketone
4 The reaction of carboxylic acids with alcohols catalysed by conc. H2SO4 is called __________
A Dehydration
B Saponification
C Esterification
D Neutralization

Answer: Esterification
5 Which one is the correct order of reactivity of different types of alcohol towards hydrogen halide?
A 1° alcohol > 2° alcohol > 3° alcohol
B 2° alcohol > 1° alcohol > 3° alcohol
C 3° alcohol > 1° alcohol > 2° alcohol
D 3° alcohol > 2° alcohol > 1° alcohol

Answer: 3° alcohol > 2° alcohol > 1° alcohol
6 The dehydration of alcohols is an example of ________
A Bimolecular elimination/E2 reaction
B SN2 reaction
C SN1 reaction
D Unimolecular elimination/E1 reaction

Answer:Unimolecular elimination/E1 reaction
7 Among the following, which is least acidic?
A Phenol
B O-cresol
C p-nitrophenol
D p-chlorophenol

Answer: O-cresol
8 Which of the following alcohols would be most soluble in water?
A Propanol
B Hexanol
C Pentanol
D Butanol

Answer: Propanol
9 What is the best reagent to convert isopropyl alcohol to isopropyl bromide?

Organic Chemistry

A HBr
B SOBr2
C Br2
D CH3MgBr

Answer: SOBr2
10 The major reason that phenol is a better Bronsted acid than cyclohexanol is ____________
A it is a better proton donor
B the cyclohexyl group is an electron donating group by induction, which destabilizes the anion formed in the reaction
C phenol is able to stabilize the anion formed in the reaction by resonance
D the phenyl group is an electron withdrawing group by induction, which stabilizes the anion formed in the reaction

Answer: phenol is able to stabilize the anion formed in the reaction by resonance

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