MHT CET · Chemistry · Alcohols Phenols and Ethers

Which among the following is the method for the preparation of ethers?

A By the action of moist \(\mathrm{Ag}_2 \mathrm{O}\) an alkyl halide
B By the action of aq. KOH on alkyl halide.
C By the action of alc. Sodium hydroxide on alkyl halide.
D By the action of sodium alkoxide on alkyl halide.

Verified Solution

Answer & Solution

Correct Answer

(D) By the action of sodium alkoxide on alkyl halide.

Step-by-step Solution

Detailed explanation

Ethers can be prepared by Williamson Synthesis in which alkyl halide is treated with sodium alkoxide.
\(\mathrm{R}-\mathrm{X}+\mathrm{Na}^{+} \mathrm{O}^{-}-\mathrm{R} \longrightarrow \mathrm{R}-\mathrm{O}^{-}-\mathrm{R}+\mathrm{NaX}\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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