Identify [ X ] used in the given reaction. [ X ]+ Copper / 573 ~K [ Y ][ Y ] [ (ii) H ₂ O / H ⁺] (i) CH ₃ MgBr Tert.butyl alcohol. (major product)

Step-by-step solution

The reaction of [ Y ] with CH ₃ MgBr followed by hydrolysis yields tert-butyl alcohol, which is 2-methylpropan-2-ol. This indicates that [ Y ] must be acetone (propanone), as the Grignard reaction of acetone with methylmagnesium bromide produces tert-butyl alcohol. The reaction [ X ] + Copper / 573 ~K [ Y ] represents the dehydrogenation of an alcohol to a carbonyl compound. Since [ Y ] is propanone ( CH₃COCH₃ ), [ X ] must be a secondary alcohol with three carbon atoms, which is propan-2-ol ( CH₃CH(OH)CH₃ ). The s