COMEDK · Chemistry · 26. Alcohols Phenols and Ethers

Two statements [A] and [B] are given below. Choose the correct option.
A) Protonated R\(-\)CH\(_2\[-\)OH can serve as Electrophiles while neutral R\(-\)OH acts as a Nucleophile.
B) The bond between O\(-\)H cleaves when R\(-\)CH\(_2\]-\)OH acts as Electrophiles and the bond between C\(-\)O cleaves when they act as Nucleophiles.

A Both the statements [A] and [B] are wrong
B Statement [A] is correct but [B] is wrong
C Both the statements [A] and [B] are correct
D Statement [B] is correct but [A] is wrong

Verified Solution

Answer & Solution

Correct Answer

(B) Statement [A] is correct but [B] is wrong

Step-by-step Solution

Detailed explanation

Alcohols can act as both nucleophiles and electrophiles. Neutral alcohols act as nucleophiles due to the presence of lone pairs of electrons on the oxygen atom. In these reactions, the O\(-\)H bond is cleaved. Protonated alcohols act as electrophiles because protonation makes…

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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