Question

In Carius method, halogen containing organic compound is heated with fuming nitric acid in the presence of ______.

Options

• HNO₃

• AgNO₃

• CuSO₄

• BaSO₄

Answer 1

In Carius method, halogen containing organic compound is heated with fuming nitric acid in the presence of AgNO₃.

Explanation:

Organic compound is heated with fuming nitric acid in the presence of silver nitrate in carius method. Lunar caustic (AgNO₃) is used as reagent here to distinguish halide ions as follows.

\[\ce{Cl- (aq) ->[AgNO3] \underset{White}{AgCl}\downarrow_{ppt}}\]

\[\ce{Br- (aq) ->[AgNO3] \underset{Pale yellow}{AgBr}\downarrow_{ppt}}\]

\[\ce{I- (aq) ->[AgNO3] \underset{Dark yellow}{AgI}\downarrow_{ppt}}\]