Nirtobenzene is formed as the major product along with a minor product in the reaction of benzene with a hot mixture of nitric acid and sulphuric acid. The minor product consists of carbon `42.86%`, hydrogen `2.40%`, nitrogen `16.67%` and oxygen `38.07%`.
a. Calculate the empirical formula of the minor product.
b. When `5.5 g` of the minor product is dissolved in `45 g` of benzene, the boiling point of the solution is `1.84 C` higher than that of pure benzen. Calculate the molar mass of the minor product and determine its molecular and structural formulae. (Molar elevation constant of benzene is `2.53 K kg mol^(-1))`

Answer

`C_(6)H_(4)N_(2)O_(4)`

Explanation

Empirical formula of minor product =`C_(3)H_(2)NO_(2)`
Empirical formula weight =`84`
or `1.84 =2.53 xx5.5/(Mw)xx1/45xx1000`
or ` Mw=168`
`"Molecular weight"/"Empirical formula weight" =168/84=2`
Molecular formula of minor product =`2xxC_(3)H_(2)NO_(2)=C_(6)H_(4)N_(2)O_(4)`