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Mulliken defined the electronegativity o...

Mulliken defined the electronegativity of an atom as the arithmetic mean of its ionisation energy and electron affinity.
`X_(A)=(1)/(2)(I.P.+E.A.)`
One more relationship given by him, if the values are given in eV is
`X_(A)=("Ionisation potential"+ "Electron affinity")/(5.6)`
When there is pure covalent bond between A-B
`((IP)_(A)+(EA)_(A))/(5.6)=((IP)_(B)+(EA)_(B))/(5.6)`
`implies X_(A)=X_(B)`
Pauling's Electronegativity scale is based on

A

Thermochemical data

B

I.E. data

C

E.A. data

D

Both (2) & (3)

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The correct Answer is:
A
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