Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy) is

Question

Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy) is (A) F > Cl > Br > I (B) F < Cl < Br < I (C) F < Cl > Br > I (D) F < Cl < Br > I

Tardigrade Admin · Accepted Answer

Electron gain enthalpy becomes less negative on moving down a group due to increase in atomic size. However, the electron gain enthalpy of F is less negative than that of Cl due to electron-electron repulsion in small sized F atom. Thus, the correct order is :

Δ_{e g} H (k J m o l^{- 1}) : F - 328 < Cl - 349 > B r - 325 > I - 295

Q. Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy) is

$F > Cl > B r > I$

$F < Cl < B r < I$

$F < Cl > B r > I$

$F < Cl < B r > I$

Q. Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy) is

F>Cl>Br>I

F<Cl<Br<I

F<Cl>Br>I

F<Cl<Br>I

$F > Cl > B r > I$

$F < Cl < B r < I$

$F < Cl > B r > I$

$F < Cl < B r > I$