TS EAMCET · Chemistry · Alcohols Phenols and Ethers

The products formed in the reaction of phenol with \(\mathrm{Br}_2\) dissolved in \(\mathrm{CS}_2\) at \(0^{\circ} \mathrm{C}\) are

A \(o\)-bromo, \(m\)-bromo and \(p\)-bromophenols
B o-bromo and \(p\)-bromophenols
C 2,4,6-tribromo and 2,3,6-tribromophenols
D 2,4-dibromo and 2,6-dibromophenols

Verified Solution

Answer & Solution

Correct Answer

(B) o-bromo and \(p\)-bromophenols

Step-by-step Solution

Detailed explanation

Phenol when treated with \(\mathrm{Br}_2\) in the presence of non-polar solvent \(\mathrm{CS}_2\), it gives only o- and \(p\)-bromophenols instead the trisubstituted products. Reason for the above observation is supression of phenoxide ion in non-polar solvent. Thus, we get only…

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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