Dolute nitric acid is generally not used for the preparation of original solution for the basic radicals because it :

Dolute nitric acid is generally not used for the preparation of origin

1.	Dolute nitric acid is generally not used for the preparation of original solution for the basic radicals because it :
Answer» it is a reducing agent it is an oxidising agent forms insoluble nitrates forms soluble nitrates Solution :In the second group of basic radicals, `H_(2)S` gas is passed through the solution. In case, the original solution is prepared in dilute `HNO_(3)` then `H_(2)S` will be oxidised to sulphur which will appear as a yellow PRECIPITATE or yellow turbidity. `2HNO_(3) rarr H_(2)O + 2NO_(2) + O` `H_(2)S + O rarr H_(2)O + S` This will interfere with the detection of `Cd^(2+)` and `As^(3+)` IONS which also FORM yellow precipitates of CdS and `As_(2)S_(3)` respectively