Q. 24

How would you obt

Answer :

(i) Phenol can be oxidised to benzoquinone by oxidising it in the presence of Na2Cr2O7 and H2SO4 (in acidic medium).



(ii) If acetone (CH3COCH3) is treated with Grignard’s reagent of methyl magnesium bromide in the presence of ether and then hydrolysis is done, we obtain 2-methylpropan-2-ol.



(iii) Addition of water in acidic medium to propene yields propan-2-ol and not propan-1-ol. This is due to the formation of more stable intermediate 2° carbocation instead of the less stable 1° carbocation as the reaction proceeds in normal acidic condition. This is because it follows Markovnikoff’s Rule of addition.



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