Which of the following is incorrect regarding concentrated nitric acid?

Options

A. Sulphur is oxidised by conc. `HNO_(3)` to sulphuric acid
B. Carbon on treatment with conc. `HNO_(3)` yields `NO_(2)+CO_(2)+H_(2)O`
C. Phosphorus reacts with conc. `HNO_(3)` to yield orthophosphoric acid
D. Iodine is oxidized by conc. `HNO_(3)` to periodic acid

Answer

4

Explanation

Nitric acid is a powerful oxidizing agent.Teh concentrated acid behaves thsu with reducing agents:
`2HNO_(3)rarrH_(2)O+2NO_(2)+O`
`S+6HNO_(3)rarrH_(2)SO_(4)+2H_(2)O+6NO_(2)`
`C+4NHO_(3)rarrCO_(2)+2H_(2)O+4NO_(2)`
`P+5HNO_(3)rarrH_(3)PO_(4)+H_(2)O+5NO_(2)`
`I_(2)+10HNO_(3)rarr2HIO_(3)+4H_(2)O+10NO_(2)`