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Anomalous Behaviour of Fluorine

Question

Which one of the following order is correct for the bond dissociation enthalpy of halogen molecules?
$C l_{2} > B r_{2} > F_{2} > I_{2}$
$I_{2} > B r_{2} > C l_{2} > F_{2}$
$B r_{2} > I_{2} > F_{2} > C l_{2}$
$F_{2} > C l_{2} > B r_{2} > I_{2}$

A

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

B

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

C

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

D

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

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Solution

Verified by Toppr

Bond dissociation energy of halogen family decreases down the group as the size of atom increases.

The decreasing order for the bond dissociation enthalpy of halogen molecules is $C l_{2} 57 kcal/mol > B r_{2} 45.5 kcal/mol > F_{2} 38 kcal/mol > 35.6 kcal/mol I_{2}$ .

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Similar Questions

Q1

Consider the following orders –
(1)

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

boiling point
(2)

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

oxidizing nature
(3)

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

EN
(4)

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

BDE
(5)

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

EA
(6)

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

Reactivity
(7)

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

Acidic nature
(8)

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

Oxidizing nature
Then calculate

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

when

x

is correct order and

y

is incorrect order.

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Q2

Arrange in increassing order of bond dissocation enthalpy of

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

View Solution

Q3

Increasing oxidising nature of

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

is :

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

.
if true enter 1, else enter 0.

View Solution

Q4

Write the Bond Energy order of :

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

View Solution

Q5

Bond energy of different halogen molecules will lie in the sequence

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

View Solution