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Standard XII

Chemistry

Chemical Properties of Phenols

Assertion :Wi...

Question

Assertion :With $B r_{2} - H_{2} O$ , phenol give s 2,4,6- tribromophenol but with $B r - C S_{2}$ , it gives 4-bromophenol as the major product.
Reason: In water ionization of phenol is enhanced but in $C S_{2}$ , it is greatly suppressed.

Read the above assertion and reason and choose the correct option regarding it.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
With $B r_{2} - H_{2} O$ , phenol gives 2,4,6- tribromophenol but with $B r - C S_{2}$ , it gives 4-bromophenol as the major product.
Because
In water ionization of phenol is enhanced but in $C S_{2}$ , it is greatly suppressed.
Hence, both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Similar questions

Assertion (A) Phenol forms 2, 4, 6-tribromophenol on treatment with $B r_{2}$ in carbon disulphide at 273K.
Reason (R) Bromine polarises in carbon disulphide.
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Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
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Assertion :With Br2−H2O, phenol give s 2,4,6- tribromophenol but with Br−CS2, it gives 4-bromophenol as the major product. Reason: In water ionization of phenol is enhanced but in CS2, it is greatly suppressed.Read the above assertion and reason and choose the correct option regarding it.