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In which of the following options order ...

In which of the following options order of arrangement does not agree with the variation of property indicated against it?

A

(a) `Al^(3+)ltMg^(2)ltNa^(+)ltF^(-)` (increasing ionic size)

B

(b) `BltCltNltO`(Increasing first ionisation enthalpy)

C

(c) `IltBrltFltCl`(increasing electron gain enthalpy)

D

(d) `LiltNaltKltRb`(Increasing metallic radius)

Text Solution

Verified by Experts

The correct Answer is:
B
Ionisation enthalpy of BltC but NgtO due to half-filled orbits in N which have extra stability.Electron gain enthalpy of CigtF due to bigger size and lesser electronic repulsion.
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