. Write the Properties of Nitrous acid
i. It is an unstable, weak acid which is known only in aqueous solution.
ii. On trying to concentrate, the acid decomposes as given below
iii. Nitrous acid and nitrites are good oxidizing agents and convert iodides to iodine, ferrous salts to ferric, stannous to stannic and sulphites to sulphates eg.
iv. With strong oxidizing agents like KMnO4 nitrous acid and nitrites function as reducing agents and get oxidized to NO3– ions: