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

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Free download in PDF Organic Chemistry Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like UPSC, NDA, SSC etc. These short solved questions or quizzes are provided by Gkseries./p>

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(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?

[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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