Test: Ethers: Preparation & Properties - NEET MCQ

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 .

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.

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

IUPAC name of diisopropyl ether is Iso propoxy propane.

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.
 

Because 3^o 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).

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

- Symmetrical Ether: An ether is symmetrical if both alkyl or aryl groups attached to the oxygen atom are identical.
- A: Diethyl ether - Consists of two ethyl groups (C₂H₅-O-C₂H₅).
- B: Ethyl methyl ether - Consists of an ethyl group and a methyl group (C₂H₅-O-CH₃).
- C: Phenyl methyl ether - Consists of a phenyl group and a methyl group (C₆H₅-O-CH₃).
- D: Benzyl ether - Typically refers to a structure with two benzyl groups.
- Correct Answer: A: Diethyl ether is symmetrical, comprising two identical ethyl groups.

- Hybridization in Ethers:
- Ethers have the general structure R-O-R', where R and R' are alkyl or aryl groups.
- The oxygen atom forms two sigma bonds: one with each R group.
- Hybridization of Oxygen:
- Oxygen in ethers uses sp³ hybridization.
- This is because it has two lone pairs and two sigma bonds, totaling four regions of electron density.
- sp³ hybridization corresponds to tetrahedral geometry, adjusting for lone pairs and resulting in a bent shape.