First slide

Electronic configuration and Atomic , physical properties

Question

Which of the following represents the decreasing order of vander wall's forces in halogens?

Moderate

A

$F_{2} > {Cl}_{2} > {Br}_{2} < I_{2}$
B

${Cl}_{2} > F_{2} > I_{2} > {Br}_{2}$
C

${Br}_{2} > {Cl}_{2} > F_{2} > I_{2}$
D

$I_{2} > {Br}_{2} > {Cl}_{2} > F_{2}$

Solution

Melting point increases with halogens from fluorine to iodine because van der Waals' forces are stronger down the groups.

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