Nitric acid stains the skin yellow.
Nitric acid has a corrosive action on the skin and causes painful blisters. It stains the skin yellow as it reacts with the protein (keratin) present in the skin and forms xanthoproteic acid.
Statement: Concentrated nitric acid, upon long-standing, turns yellow-brown due to the formation of NO2.
State whether the given statement is true or false.
Pure nitric acid is colourless but the acid obtained in the laboratory is slightly yellow. The yellow colour is due to___.
Nitric acid stains the skin black.