Chemistry - Complete Pblock- Question with Solution | TestHub

Question Explanation:

Identify the reaction(s) where a halogen is NOT displaced from the solution of its halide. Concept: Redox reactions of Halogens (Displacement reactions).

Solution:

A halogen $\left({\mathrm{X}}_2\right)$ can displace a halide ion $\left({\mathrm{Y}}^{-}\right)$from solution only if ${\mathrm{X}}_2$ is a stronger oxidizing agent (higher SRP) than ${\mathrm{Y}}_2$. Oxidizing power: ${\mathrm{F}}_2>{\mathrm{Cl}}_2>{\mathrm{Br}}_2>{\mathrm{I}}_2$.

Smaller halogen (i.e. stronger oxidising agent) displaces bigger halogen (i.e. weaker oxidising agent) from solution of its halide for 1.g. ${\mathrm{Br}}^{\ominus }+{\mathrm{Cl}}_2\to {\mathrm{Br}}_2+2{\mathrm{Cl}}^{\ominus }$.

Final Answer: ${\mathrm{Br}}_2$ added to NaCl and ${\mathrm{Cl}}_2$ added to NaF