Question

Among halogens, the correct order of electron gain enthalpy is :

• A. F>Cl> Br>I
• B. F<Cl< Br>I
• C. F<Cl> Br>I
• D. F<Cl< Br<I

Answer 1

Answer:

C. F<Cl> Br>I

The correct order of electron gain enthalpy among halogens is:

F < Cl > Br > I

This order makes sense because:

• Fluorine (F) has a small atomic size, making it difficult to add an electron.

• Chlorine (Cl) has a slightly larger atomic size, making it easier to add an electron.

• Bromine (Br) and Iodine (I) have even larger atomic sizes, making it even easier to add an electron.

So, the electron gain enthalpy generally decreases as you move down the halogen group.