Which of the following combinations is used to prepare nitric acid in the laboratory?

Options

A. `NaNO_(3)` and conc. `H_(2)SO_(4)`
B. `N_(2)` and `O_(2)`
C. `NH_(3)` and `O_(2)`
D. `NaNO_(2)` and conc. `H_(2)SO_(4)`

Answer

1

Explanation

`HNO_(3)` was named aqua fortis (meaning strong water ) by alchemists. Glauber obtained it by the action of sulphuric acid on nitre. It is prepared in the laboratory by distilling sodium or potassium nitrate with concentrated sulphuric acid in a glass retort
`NaNO_(3)+H_(2)SO_(4)rarrNaHSO_(4)+HNO_(3)`
The vapout of nitric acid are condensed in a glass receiver. The nitric acis so obtained may contain oxides of nitrogen as impurity. The dissolved oxides of nitrogen are removed by redistillation or blowing a current of `CO_(2)` through warm acid.