Question

phenol gives polysubstitution product with bromine water but monosubstitution product with br2/cs2​

Answer 1

.With Br2−H2O, phenol gives 2,4,6- tribromophenol but with Br−CS2, it gives 4-bromophenol as the major product.

Because

In water ionization of phenol is enhanced but in CS2, it is greatly suppressed.

Hence, both Assertion and Reason are correct and Reason is the correct explanation for Assertion.