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Anomalous Behaviour of Fluorine

Choose correc...

Question

Choose correct squence for the following species.

F_{2} > C l_{2} > B r_{2} > I_{2}

(Reducing power)

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C l_{2} < F_{2} < B r_{2} < I_{2}

(Reactivity)

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I_{2} > B r_{2} > F_{2} > C l_{2}

(Bond length)

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C l_{2} > B r_{2} > F_{2} > I_{2}

(Bond dissociation enthalpy)

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Solution

The correct option is C $C l_{2} > B r_{2} > F_{2} > I_{2}$ (Bond dissociation enthalpy)
Bond dissociation enthalpy decreases down the group . Bond dissociation enthalpy is inversely proportional to the atomic radii. More the size less the attraction between atoms . But the bond dissociation enthalpy of fluorine is less than expected . There is interelectronic repulsion in fluorine atom due to its small size. Due to this repulsion bond dissociation enthalpy of fluorine is less than that of bromine and chlorine .

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Similar questions

F_{2} > C l_{2} > B r_{2} > I_{2} :

F_{2} > C l_{2} > B r_{2} > I_{2} :

F_{2} > C l_{2} > B r_{2} > I_{2} :

F_{2} > C l_{2} > B r_{2} > I_{2} :

F_{2} > C l_{2} > B r_{2} > I_{2} :

F_{2} > C l_{2} > B r_{2} > I_{2} :

H O C l > H C l O_{2} > H C l O_{3} > H C l O_{4} :

H O C l > H C l O_{2} > H C l O_{3} > H C l O_{4} :

(x^{2} + y^{2})

x

y

I_{2}, {B r}_{2}, {C l}_{2}, F_{2}

I_{2} < {B r}_{2} < {C l}_{2} < F_{2}

F_{2}, C l_{2}, B r_{2}, I_{2}

F_{2}, C l_{2}, B r_{2}, I_{2}

F_{2} > C l_{2} > B r_{2} > I_{2}

F_{2} > C l_{2} > B r_{2} > I_{2}

C l > F > B r > I

F > C l > B r > I

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