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Give methods of preparation for benzene. |
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Answer» Solution :Industrially, benzene is prepared from the coal tar. In LESS proportional benzene is prepared by following methods : (i) Benzene is prepared by cyclic polymerisation of ethyne:  (ii) Benzene is formed by cyclization of n-hexane :  (III) By decarboxylation of benzoic acid : Heating of benzoic acid with soda lime gives benzene.  (iv) By REDUCTION of PHENOL gives benzene : 
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