Question

Nitrobenzene 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%.

(i) Calculate the empirical formula of the minor product.

(ii) 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 benzene. Calculate the molar mass of the minor product and determine its molecular and structural formula.

(Molal elevation constant of benzene = 2.53 K kg mol -1 )

Answer 1

Table for empirical formula of minor product of nitration of nitrobenzene

Hence, empirical formula of minor product: C3H2NO.

Mol. wt. of minor product m

Hence, empirical formula of minor product