Question

Why is nitric acid generally not used for the preparation of original solutions in analysis of basic radicals, because it?
A.Is an oxidizing agent.
B.Is reducing agents.
C.Forms insoluble nitrates.
D.Forms soluble nitrates.

Answer 1

Hint: Identification of basic radical is more complicated than that of acidic radicals due to the presence of a great number of basic radicals also due to their interference each other, It is difficult to separate them from each other, also the same radical may have more than one oxidation state, The confirmatory test is limited.

Complete step by step answer:
Nitric acid​ is generally not used for preparation of original solution in analysis of basic radicals, because it is an oxidizing agent which will convert all low oxidation cations into higher one and these cations can not be recognised in presence of this acid.
Hence the correct option is (a).

Note:
Basic radical are divided into six analytical groups, and each group has its reagent which is called group reagent, The group reagent reacts with the salt solution to give an insoluble salts precipitated, Identification of the basic radicals depends upon the properties of the precipitate, The basic radicals of the salt to be identified are in the form of solutions.
Classification depends on differing in solubility of the salts of these metals in water, for example, metal chloride of the first analytical group which are chloride of silver (I), mercury (I), lead (II) are sparingly soluble in water, so, they can be precipitated as chloride on adding the group reagent which is dilute hydrochloric acid.