Question

Among the following halogens $F_2, \, Cl_2, \, Br_2, \, \text{and} \, I_2$
Which can undergo disproportionation reaction?

• A. Only $I_2$
• B. $Cl_2, \, Br_2, \, \text{and} \, I_2$
• C. $F_2, \, Cl_2, \, \text{and} \, Br_2$
• D. $F_2 \, \text{and} \, Cl_2$

Answer 1

Answer: (B)

$Cl_2, \, Br_2, \, \text{and} \, I_2$

Answer 2

Fluorine does not undergo disproportionation because it is the most electronegative element and cannot exist in a positive oxidation state. However, Cl$_2$, Br$_2$, and I$_2$ can undergo disproportionation as they have intermediate oxidation states and can be oxidized as well as reduced in reactions.