- oxidising agent : its reaction with copper, carbon, sulphur
Nitric acid cannot be concentrated beyond 68% by the distillation of a dilute solution of `HNO_3` State the reason.
Give reasons for the following:
In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitrate should not be heated very strongly above 200°C.
Fill in the blanks using the appropriate words given below :
(Sulphur dioxide, nitrogen dioxide, Nitric oxide, Sulphuric acid)
Cold, dilute nitric acid reacts with copper to give ___________.