Organic Chemistry Multiple Choice Questions and Answers

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

View Answer

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

View Answer

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

View Answer

Answer: Ketone

4 The reaction of carboxylic acids with alcohols catalysed by conc. H2SO4 is called __________

A Dehydration

B Saponification

C Esterification

D Neutralization

View Answer

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

View Answer

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

View Answer

Answer:Unimolecular elimination/E1 reaction

7 Among the following, which is least acidic?

A Phenol

B O-cresol

C p-nitrophenol

D p-chlorophenol

View Answer

Answer: O-cresol

8 Which of the following alcohols would be most soluble in water?

A Propanol

B Hexanol

C Pentanol

D Butanol

View Answer

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

View Answer

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

View Answer

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

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