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Periodic Properties

Which of the ...

Question

Which of the following has an incorrect order of listed properties?

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

: Bond dissociation energy

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

: Oxidising power

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F > C l > B r > I

: Electron gain enthalpy

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F > C l > B r > I

: Electronegativity

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Solution

The correct options are
A $F_{2} > C l_{2} > B r_{2} > I_{2}$ : Bond dissociation energy
C $F > C l > B r > I$ : Electron gain enthalpy
The correct order of bond dissociation energy is $C l_{2} > B r_{2} > F_{2} > I_{2}$ because in $F_{2}$ there is more inter-electronic repulsion because of which its bond becomes weak.

Oxidising power $\propto$ electronegativity
Thus the order of oxidising power is $F_{2} > C l_{2} > B r_{2} > I_{2}$

Electron gain enthalpy: The amount of heat released when an extra electron is added.

$electron gain enthaly \propto size \propto inter electronic repulsion$

The electron gain enthalpy of chlorine is greater because of less inter electronic repulsion than florine.
The correct order of electron gain enthalpy is $C l > F > B r > I$

Down the group electronegativity decrease.

Suggest Corrections

Similar questions

Q. Which of the following options does not give to the correct trends indicated against it?
(I)

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

: Bond dissociation energy
(II)

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

: Oxidizing nature
(III)

C l > F > B r > I

: Electron gain enthalpy
(IV)

F > C l > B r > I

: Electronegativity

Q. Which of the following options does not give to the correct trends indicated against it?
(I)

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

: Bond dissociation energy
(II)

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

: Oxidizing nature
(III)

C l > F > B r > I

: Electron gain enthalpy
(IV)

F > C l > B r > I

: Electronegativity

Q. 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.

The correct order of the oxidizing power of Cl₂, Br₂, I₂ and O₂ is:

Q. Assertion :In organic layer test,

C l_{2}

water is added to the sodium extract, which oxidises

B r^{⊝}

and

I^{⊝}

ions to

B r^{⊝}

and

I_{2}

respectively Reason: Reduction potential of

C l_{2}

is greater than that of

B r_{2}

and

I_{2}

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