NCERT Exemplar Chemistry

Question

Assertion: Phenol forms 2, 4, 6 – tribromophenol on treatment with $ ext{Br}_2$ in carbon disulphide at 273K.
Reason: Bromine polarises in carbon disulphide. A). Both Assertion and Reason are correct and Reason is the correct explanation for Assertion. B). Assertion is a correct statement but Reason is a wrong statement. C). Assertion is a wrong statement but Reason is a correct statement. D). Both Assertion and Reason are wrong statements.

Edvaya · Accepted Answer

The correct answer is Both Assertion and Reason are wrong statements.. The Assertion is a wrong statement because treating phenol with $	ext{Br}_2$ in a non-polar solvent like carbon disulphide ($	ext{CS}_2$) at low temperature (273 K) yields monobromophenols (mainly p -bromophenol), not the tribromo derivative. The Reason is also a wrong statement because bromine does not polarise effectively in a non-polar solvent like $	ext{CS}_2$.

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Chemistry > Organic Chemistry > Alcohols Phenols And Ethers

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