Question

What is added with ${\mathbf{HNO}}_{\mathbf{3}}$ in Carius method?

• A. ${\mathrm{H}}_2{\mathrm{SO}}_4$
• B. ${\mathrm{AgNO}}_3$
• C. ${\mathrm{HNO}}_3$
• D. ${\mathrm{CaCO}}_3$

Answer 1

The correct option is B

${\mathrm{AgNO}}_3$

The explanation for correct option: (B)

1. Carius method is used for the estimation of halogens.
2. In this method, an organic compound of known mass along with fuming Nitric acid $\left({\mathrm{HNO}}_3\right)$ in the presence of Silver nitrate $\left({\mathrm{AgNO}}_3\right)$ is heated in the Carius tube in a furnace.
3. The Carbon and Hydrogen is converted into Carbon dioxide and water and the halogen is attached to Silver resulting in the formation of the corresponding Silver halide.
4. This suggests that in the Carius method ${\mathrm{AgNO}}_3$ is added with${\mathrm{HNO}}_3$.

Therefore, option (B) is correct. ${\mathrm{AgNO}}_3$ added within${\mathbf{HNO}}_{\mathbf{3}}$ in the Carius method.