Answer the following with suitable equation wherever necessary
(i) How can you prepare benzene from lime?
(ii) How will you convert toluene to m-nitrobenzonic acid?

Explanation

Lime is heated with coke at high temperature and then hydrolysed to from acetylene. This is acetylene on passing through a red hot tube polymerises to from benzene.
`underset("Lime")(CaO) + underset("Coke")(3C) overset(2000^(@)C)(rarr) underset("carbide")underset("Calcium")(CaC_(2)) + CO uarr`
`CaC_(2) + 2H_(2)O rarr underset("Accetylene")(C_(2)H_(2)) + Ca(OH)_(2)`