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Which is not the correct order of the st...

Which is not the correct order of the stated property?

A

`Ba gt Sr gt Mg`: Atomic radius

B

`F gt O gt N` : First ionisation energy

C

`Cl gt F gt I` : Negative electron gain enthalpy

D

`O gt Se gt Te` : Electronegativity.

Text Solution

Verified by Experts

The correct Answer is:
B
First ionisation energy of nitorgen is greater than oxygen because of half filled electronic configuration.
`N:1s^(2)2s^(2)2p^(3)" "O:1s^(2)2s^(2)2p^(4)`
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