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Test: Ethers: Preparation & Properties


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Test: Ethers: Preparation & Properties - Question 1

C2H5OH and CH3OCH3 are:

Detailed Solution for Test: Ethers: Preparation & Properties - Question 1

Alkyl alcohol and ether having same molecular formula ( Here C2H6O) are functional isomers of each other. As both having different functional group first one has -OH & second one has -O- functional group in the same carbon chain respectively .

Test: Ethers: Preparation & Properties - Question 2

Ethers may be used as solvents because they react only with which of the following reactants?

Detailed Solution for Test: Ethers: Preparation & Properties - Question 2

Ethers resist the attack of nucleophiles and bases. However, they are very good solvents in many organic reactions due to their ability to solvate cations by donating the electron pair from oxygen atom. Ethers are generally less reactive and react only with acids.

Test: Ethers: Preparation & Properties - Question 3

 Ethers are :

Detailed Solution for Test: Ethers: Preparation & Properties - Question 3

Ethers are compounds which are basic in nature. There is no acidic H in the compound while it has a donor O atom.

Test: Ethers: Preparation & Properties - Question 4

What is the IUPAC name of di-isopropyl ether

Detailed Solution for Test: Ethers: Preparation & Properties - Question 4

IUPAC name of diisopropyl ether is Iso propoxy propane.

 

Test: Ethers: Preparation & Properties - Question 5

Among the alkenes which one produces tertiary butyl alcohol on acid hydration

Detailed Solution for Test: Ethers: Preparation & Properties - Question 5

When treated with aq. acid, most commonly H2SO4, alkenes form alcohols. Regioselectivity predicted by Markovnikov’s rule. Reaction proceeds via protonation to give the more stable carbocation intermediate. Not stereoselective since reactions proceeds via planar carbocation.

Test: Ethers: Preparation & Properties - Question 6

 Williamsons synthesis is an example of :

Detailed Solution for Test: Ethers: Preparation & Properties - Question 6

The Williamson ether synthesis is an organic reaction used to convert an alcohol and an alkyl halide to an ether using a base such as NaOH. The mechanism begins with the base abstracting the proton from the alcohol to form an alkoxide intermediate. The alkoxide then attacks the alkyl halide in a nucleophilic substi-tution reaction (SN2), which results in the formation of the final ether product and a metal halide by-product.
 

Test: Ethers: Preparation & Properties - Question 7

To prepare tert-butyl ethyl ether, the reagents required are:

 

Detailed Solution for Test: Ethers: Preparation & Properties - Question 7

Because 3o haloalkanes like tert-butyl bromide (option a) give alkenes and not ethers when treated with a strong base like sodium ethoxide. So the exact answer is (b).

Test: Ethers: Preparation & Properties - Question 8

 Nitration of anisole gives majorly:

Detailed Solution for Test: Ethers: Preparation & Properties - Question 8

When anisole is nitrated with a mixture of conc HNO3 and H2SO4 it gives a mixture of ortho-Nitroanisole and para-Nitroanisole (major) products.

Test: Ethers: Preparation & Properties - Question 9

Which of the following compounds will react with sodium hydroxide solution in water?

Detailed Solution for Test: Ethers: Preparation & Properties - Question 9

Phenol being more acidic than alcohols, dissolves in NaOH

Test: Ethers: Preparation & Properties - Question 10

 According to Lewis concept of acids and bases, ethers are:

Detailed Solution for Test: Ethers: Preparation & Properties - Question 10

Ethers behave as Lewis bases due to the presence of two lone pair of electrons on oxygen atom.

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