How will you convert ethanol to ethane ?

Explanation

(a) (i) A primary alcohol is dehydrogenated to an aldehyde .
`underset("Primary alcohol")(R-underset(H)underset(|)overset(H)overset(|)(C)-O-H)overset(Cu//573K)tounderset("Aldehyde")(R-overset(H)overset(|)(C)=O)+H_(2)uarr`
`underset("Ethyl alcohol")(CH_(3)CH_(2)OH)overset(Cu//573K)toR-underset("Acetaldehyde")overset(H)overset(||)(C)=O+H_(2)uarr`
(ii) A secondary alcohols is dehydrogenated to a ketone .
`underset("Secondary alcohol")(R-underset(H)underset(|)overset(R)overset(|)(C)OH)overset(Cu//573K)toR-overset(R)overset(|)(C)=O+H_(2)uarr`
`underset("Isopropyl alcohol")(CH_(3)-overset(CH_(3))overset(|)(C)-OH)overset(Cu//573K)toCH_(3)-underset("Acetone")overset(CH_(3))overset(|)(C)=O+H_(2)uarr`
`underset("Sec -Butyl alcohol")(CH_(3)-CH_(2))-overset(CH_(3))overset(|)(CH)-OHoverset(Cu//573K)toCH_(3)-CH_(2)-overset(CH_(3))overset(|)(C)=cap+H_(2)uarr`
(ii) Tertiary alcohol gets dehydrated to form an alkene .