Question

Write the structure of A, B, C, D and E in the following sequence of reactions :
NH3 + O2 →A + H2O
A + O2 → B (Brown fumes)
B + H2O → C + A (C is an oxoacid)
C + I → D (Violet vapours)
Complete the reactions of the above mentioned sequence and name the process by which x91Cx92 is obtained.

Answer 1

A is NO and Ostwald process for the manufacture of HNO3.
2NO + O2 → 2NO2
(A)
3NO2 + H2O → 2HNO3 + NO
(B) (C)

6I- + 2NO3- + 8H+ → 3I2 + 2NO + 4H2O