1.

Which of the following is incorrect regarding concentrated nitric acid?A. Sulphur is oxidised by conc. `HNO_(3)` to sulphuric acidB. 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 acidD. Iodine is oxidized by conc. `HNO_(3)` to periodic acid

Answer» Correct Answer - 4
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)`


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