Nitric oxide`(NO)`is prepared in the laboratory by

Options

A. the reduction of dilute `HNO_(3)` with `Cu`
B. the catalytic oxidation of ammonia
C. subjecting a mixture of nitrogen and oxygen to an electric spark
D. warming potassiun nitrate with dilute sulphuric acid and ferrous sulphate solution

Answer

1

Explanation

Coppor chips are taken in a woulfe-bottle and some water is added. Concentrated nitric acid is poured thorugh the thistle funnel and tha nitric oxide liberated is collected over water.
`3Cu+8HNO_(3)rarr3Cu(NO_(3))_(2)+2NO+4H_(2)O`
Nitric oxide is an important intermediate in the manufacture of nitric acid by the catalytic oxidation of ammonia ( ostwald process):
`4NH_(3)+5O_(2)overset("Pt gauze")rarr4NO+6H_(2)O`
It was also important in the obsolete Birkeland-Eyde process which involved nitrogen and oxygen,
`N_(2)(g)+O_(2)(g)overset("Electric")underset("spark")rarr2NO(g)`
`NO` molecule is an atmospheri pollutant commonly formed as a sode reaction inhigh -comparised internal combustion engines when dinitrogen and dioxygen are compressed and sparked:
`N_(2)(g)+O_(2)(g) hArr 2NO(g)`
A pure sample of nitric oxide is obtained when a mixture of `KNO_(3), FeSO_(4)` and dilute `H_(2)SO_(4)` is heated:
`{:(2KNO_(3)+H_(2)SO_(4) rarr K_(2)SO_(4) +2HNO_(3)),(2HNO_(3) rarr H_(2)O+2NO+3O),([2FeSO_(4)+H_(2)SO_(4)+O rarr Fe_(2)(SO_(4))_(3)+H_(2)O]xx3),(bar(2KNO_(3)+6FeSO_(4)+4H_(2)SO_(4) rarr K_(2)SO_(4)+3Fe_(2)(SO_(4))_(3)+2NO+4H_(2)O)):}`