SATHEE: The P Block Elements - Result Question 71

The P Block Elements - Result Question 71

####74. Which one of the following arrangements does not give the correct picture of the trends indicated against it?

[2000, 2008]

(a) $F_{2} > C l_{2} > B r_{2} > I_{2}$ : Oxidizing power

(b) $F_{2} > C l_{2} > B r_{2} > I_{2}$ : Electron gain enthalpy

(d) $F_{2} > C l_{2} > B r_{2} > I_{2}$ : Electronegativity.

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Solution:

(b and c)

(a) The oxidising power of halogen follow the order $F_{2} > C l_{2} > B r_{2} > I_{2}$ .

(b) The correct order of electron gain enthalpy of halogens is $C l_{2} > F_{2} > B r_{2} > I_{2}$ . The low value of $F_{2}$ than $C l_{2}$ is due to its small size.

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

(d) It is the correct order of electronegativity values of halogens.

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

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The P Block Elements - Result Question 71

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