Which one of the following arrangements does not give the correct pict

1.	Which one of the following arrangements does not give the correct picture of the trends indicated against it? (a) F2 > Cl2 > Br2 > I2 : Bond dissociation energy (b) F2 > Cl2 > Br2 > I2 : Electronegativity (c) F2 > Cl2 > Br2 > I2 : Oxidizing power (d) F2 > Cl2 > Br2 > I2 : Eiectron gain enthalpy
Answer» The correct option is : (a) F₂ > Cl₂ > Br₂ > I₂ : Bond dissociation energy (d) F₂ > Cl₂ > Br₂ > I₂ : Eiectron gain enthalpy Explanation: In case of diatomic molecules (X₂) of halogens the bond dissociation energy decreases in the order : Cl₂ > Br₂ > F₂ > I₂ The oxidising power, electronegativity and reactivity decrease in the order : F₂ > Cl₂ > Br₂ > I₂ Electron gain enthalpy of halogens follows the given order: Cl₂ > F₂ > Br₂ > I₂ The low value of electron gain enthalpy (electron enthalpy) of fluorine is probably due to small size of fluorine atom.

Which one of the following arrangements does not give the correct picture of the trends indicated against it? (a) F2 > Cl2 > Br2 > I2 : Bond dissociation energy (b) F2 > Cl2 > Br2 > I2 : Electronegativity (c) F2 > Cl2 > Br2 > I2 : Oxidizing power (d) F2 > Cl2 > Br2 > I2 : Eiectron gain enthalpy

Answer»

The correct option is : (a) F₂ > Cl₂ > Br₂ > I₂ : Bond dissociation energy

(d) F₂ > Cl₂ > Br₂ > I₂ : Eiectron gain enthalpy

Explanation:

In case of diatomic molecules (X₂) of halogens the bond dissociation energy decreases in the order :

Cl₂ > Br₂ > F₂ > I₂

The oxidising power, electronegativity and reactivity decrease in the order :

F₂ > Cl₂ > Br₂ > I₂

Electron gain enthalpy of halogens follows the given order:

Cl₂ > F₂ > Br₂ > I₂

The low value of electron gain enthalpy (electron enthalpy) of fluorine is probably due to small size of fluorine atom.

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