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Organic Chemistry Questions and Answers – Reactions of Ethers | 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) An ether is more volatile than an alcohol having the same molecular formula. What is the reason for this difference?
[A] dipolar character of ethers
[B] alcohols having resonance structures
[C] inter-molecular hydrogen bonding in ethers
[D] inter-molecular hydrogen bonding in alcohols
Answer: inter-molecular hydrogen bonding in alcohols
(2) Ethers may be used as solvents because they react only with which of the following reactants?
[A] Acids
[B] Bases
[C] Oxidising agent
[D] Reducing agents
Answer: Acids

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(3) What are the products when ethyl isopropyl ether is cleaved with concentrated HI?
[A] ethanol and 2-iodo-2-methylpropane
[B] ethanol and 2-methylpropane
[C] iodoethane and isopropyl alcohol
[D] iodoethane and 2-methylpropane
Answer: iodoethane and isopropyl alcohol
(4) What are the products when tert-butyl ethyl ether is cleaved with concentrated HI?
[A] iodoethane and tert-butanol
[B] iodoethane and 2-iodo-2-methylpropane
[C] ethanol and 2-iodo-2-methylpropane
[D] ethanol and tert-butanol
Answer: ethanol and 2-iodo-2-methylpropane
(5) Which pair of products would result from the acid cleavage of phenyl propyl ether with excess concentrated HBr at an elevated temperature?
[A] Phenol and 1-propanol
[B] Bromobenzene and 1-propanol
[C] Bromobenzene and 1-bromopropane
[D] Phenol and 1-bromopropane
Answer: Phenol and 1-bromopropane
(6) Select the ether among following that yields methanol as one of the products on reaction with cold hydroiodic acid.
[A] 1-Methoxybutane
[B] 1-Methoxy-2-methylpropane
[C] 2-Methoxy-2-methylpropane
[D] Methoxybenzene
Answer: 2-Methoxy-2-methylpropane
(7) The boiling point of ethyl alcohol is much higher than that of dimethyl ether though both have the same molecular weight. Why?
[A] Ether is insoluble in water
[B] Methyl groups are attached to oxygen in ether
[C] Dipole moment of ethyl alcohol is less
[D] Ethyl alcohol shows hydrogen bonding
Answer: Ethyl alcohol shows hydrogen bonding
(8) Which pair of products would result from the acid cleavage of tert-butyl propyl ether with excess concentrated HBr at an elevated temperature?
[A] tert-butyl bromide and propyl alcohol
[B] tert-butyl bromide and propyl bromide
[C] tert-butyl alcohol and propyl bromide
[D] 2-methyl-2-butene and propyl bromide
Answer: tert-butyl bromide and propyl bromide
(9) Which of the following is the name reaction of the given reaction?

[A] Wollf’s rearrangement
[B] Favorskii rearrangement
[C] Pinacol rearrangement
[D] Claisen rearrangement
Answer: Claisen rearrangement
(10) Which of the following will be obtained by keeping ether in contact with air for a long time?
[A] C2H5−O−CH (CH3)−O−OH
[B]  C2H5−OCH2−OH
[C]  C2H5−O−C2H5OH
[D]  CH3−O CH (CH3)−O−OH
Answer: C2H5−O−CH (CH3)−O−OH

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