The following flow diagram represents the industrial preparation of nitric acid from ammonia.

Which of the following options describes the reagents, products and reaction condition ?

Options

A. `{:("(p)","(q)","(r)","(s)"),("Catalyst and high pressure","Cool",NO_2,H_2O and O_2):}`
B. `{:("(p)","(q)","(r)","(s)"),("Catalyst","Cool",N_2O,HNO_3 and O_2):}`
C. `{:("(p)","(q)","(r)","(s)"),("Catalyst and high pressure","High pressure",NO_2,H_2O and O_2):}`
D. `{:("(p)","(q)","(r)","(s)"),("High pressure","Catalyst",N_2O_3, HNO_3):}`

Answer

A

Explanation

`4NH_3(g)+5 O_2 (g) underset(850^@C,5 "atmoshphere")overset("platiunum/Rhodium catalyst")to3NO(g)`
`4ano(g)+O_2("from air")underset(-25^@C)overset("cool to")hArr 2NO_2(g)`
`H_2O + NO_2 +O_2 toHNO_3 +NO`